diff --git a/exercises/README.md b/exercises/README.md
index c7effa9..40740ae 100644
--- a/exercises/README.md
+++ b/exercises/README.md
@@ -1,4 +1,4 @@
-# Exercise to Book Chapter mapping
+# Exercise to Book Chapter mappingd
 
 | Exercise               | Book Chapter        |
 | ---------------------- | ------------------- |
diff --git a/exercises/functions/functions1.rs b/exercises/functions/functions1.rs
index 40ed9a0..d01d710 100644
--- a/exercises/functions/functions1.rs
+++ b/exercises/functions/functions1.rs
@@ -1,10 +1,11 @@
 // functions1.rs
-//
-// Execute `rustlings hint functions1` or use the `hint` watch subcommand for a
-// hint.
+// Execute `rustlings hint functions1` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
 
+
+fn call_me(){
+    println!("Func1:hello world")
+}
 fn main() {
     call_me();
 }
diff --git a/exercises/functions/functions2.rs b/exercises/functions/functions2.rs
index 5154f34..a40777f 100644
--- a/exercises/functions/functions2.rs
+++ b/exercises/functions/functions2.rs
@@ -1,15 +1,13 @@
 // functions2.rs
-//
-// Execute `rustlings hint functions2` or use the `hint` watch subcommand for a
-// hint.
+// Execute `rustlings hint functions2` or use the `hint` watch subcommand for a hint.
+
 
-// I AM NOT DONE
 
 fn main() {
     call_me(3);
 }
 
-fn call_me(num:) {
+fn call_me(num:i32) {
     for i in 0..num {
         println!("Ring! Call number {}", i + 1);
     }
diff --git a/exercises/functions/functions3.rs b/exercises/functions/functions3.rs
index 74f44d6..dd6931b 100644
--- a/exercises/functions/functions3.rs
+++ b/exercises/functions/functions3.rs
@@ -1,12 +1,10 @@
 // functions3.rs
-//
-// Execute `rustlings hint functions3` or use the `hint` watch subcommand for a
-// hint.
+// Execute `rustlings hint functions3` or use the `hint` watch subcommand for a hint.
+
 
-// I AM NOT DONE
 
 fn main() {
-    call_me();
+    call_me(1);
 }
 
 fn call_me(num: u32) {
diff --git a/exercises/functions/functions4.rs b/exercises/functions/functions4.rs
index 77c4b2a..9e46c48 100644
--- a/exercises/functions/functions4.rs
+++ b/exercises/functions/functions4.rs
@@ -1,21 +1,20 @@
 // functions4.rs
-//
-// This store is having a sale where if the price is an even number, you get 10
-// Rustbucks off, but if it's an odd number, it's 3 Rustbucks off. (Don't worry
-// about the function bodies themselves, we're only interested in the signatures
-// for now. If anything, this is a good way to peek ahead to future exercises!)
-//
-// Execute `rustlings hint functions4` or use the `hint` watch subcommand for a
-// hint.
+// Execute `rustlings hint functions4` or use the `hint` watch subcommand for a hint.
+
+// This store is having a sale where if the price is an even number, you get
+// 10 Rustbucks off, but if it's an odd number, it's 3 Rustbucks off.
+// (Don't worry about the function bodies themselves, we're only interested
+// in the signatures for now. If anything, this is a good way to peek ahead
+// to future exercises!)
+
 
-// I AM NOT DONE
 
 fn main() {
     let original_price = 51;
     println!("Your sale price is {}", sale_price(original_price));
 }
 
-fn sale_price(price: i32) -> {
+fn sale_price(price: i32) -> i32 {
     if is_even(price) {
         price - 10
     } else {
diff --git a/exercises/functions/functions5.rs b/exercises/functions/functions5.rs
index f1b63f4..3da5172 100644
--- a/exercises/functions/functions5.rs
+++ b/exercises/functions/functions5.rs
@@ -1,9 +1,7 @@
 // functions5.rs
-//
-// Execute `rustlings hint functions5` or use the `hint` watch subcommand for a
-// hint.
+// Execute `rustlings hint functions5` or use the `hint` watch subcommand for a hint.
+
 
-// I AM NOT DONE
 
 fn main() {
     let answer = square(3);
@@ -11,5 +9,5 @@ fn main() {
 }
 
 fn square(num: i32) -> i32 {
-    num * num;
+    num * num
 }
diff --git a/exercises/if/if1.rs b/exercises/if/if1.rs
index d8108a0..69a89b8 100644
--- a/exercises/if/if1.rs
+++ b/exercises/if/if1.rs
@@ -1,14 +1,17 @@
 // if1.rs
-//
 // Execute `rustlings hint if1` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
 
 pub fn bigger(a: i32, b: i32) -> i32 {
     // Complete this function to return the bigger number!
     // Do not use:
     // - another function call
     // - additional variables
+    if a>b{
+        a
+    }else{
+        b
+    }
 }
 
 // Don't mind this for now :)
diff --git a/exercises/if/if2.rs b/exercises/if/if2.rs
index f512f13..70ac1fd 100644
--- a/exercises/if/if2.rs
+++ b/exercises/if/if2.rs
@@ -1,17 +1,18 @@
 // if2.rs
-//
+
 // Step 1: Make me compile!
 // Step 2: Get the bar_for_fuzz and default_to_baz tests passing!
-//
 // Execute `rustlings hint if2` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
+
 
 pub fn foo_if_fizz(fizzish: &str) -> &str {
     if fizzish == "fizz" {
         "foo"
-    } else {
-        1
+    } else if fizzish == "fuzz" {
+        "bar"
+    }else{
+        "baz"
     }
 }
 
diff --git a/exercises/if/if3.rs b/exercises/if/if3.rs
index 73a7025..de25267 100644
--- a/exercises/if/if3.rs
+++ b/exercises/if/if3.rs
@@ -2,17 +2,17 @@
 //
 // Execute `rustlings hint if3` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
+
 
 pub fn animal_habitat(animal: &str) -> &'static str {
     let identifier = if animal == "crab" {
         1
     } else if animal == "gopher" {
-        2.0
+        2
     } else if animal == "snake" {
         3
     } else {
-        "Unknown"
+        4
     };
 
     // DO NOT CHANGE THIS STATEMENT BELOW
diff --git a/exercises/intro/intro1.rs b/exercises/intro/intro1.rs
index 6bb098a..1901f94 100644
--- a/exercises/intro/intro1.rs
+++ b/exercises/intro/intro1.rs
@@ -1,21 +1,18 @@
 // intro1.rs
-//
 // About this `I AM NOT DONE` thing:
 // We sometimes encourage you to keep trying things on a given exercise, even
 // after you already figured it out. If you got everything working and feel
 // ready for the next exercise, remove the `I AM NOT DONE` comment below.
+// Execute `rustlings hint intro1` or use the `hint` watch subcommand for a hint.
 //
-// If you're running this using `rustlings watch`: The exercise file will be
-// reloaded when you change one of the lines below! Try adding a `println!`
-// line, or try changing what it outputs in your terminal. Try removing a
-// semicolon and see what happens!
-//
-// Execute `rustlings hint intro1` or use the `hint` watch subcommand for a
-// hint.
+// If you're running this using `rustlings watch`: The exercise file will be reloaded
+// when you change one of the lines below! Try adding a `println!` line, or try changing
+// what it outputs in your terminal. Try removing a semicolon and see what happens!
+
 
 
 fn main() {
-    println!("Hello and");
+    println!("Hello adajo!");
     println!(r#"       welcome to...                      "#);
     println!(r#"                 _   _ _                  "#);
     println!(r#"  _ __ _   _ ___| |_| (_)_ __   __ _ ___  "#);
@@ -29,12 +26,5 @@ fn main() {
     println!("solve the exercises. Good luck!");
     println!();
     println!("The source for this exercise is in `exercises/intro/intro1.rs`. Have a look!");
-    println!(
-        "Going forward, the source of the exercises will always be in the success/failure output."
-    );
-    println!();
-    println!(
-        "If you want to use rust-analyzer, Rust's LSP implementation, make sure your editor is set"
-    );
-    println!("up, and then run `rustlings lsp` before continuing.")
+    println!("Going forward, the source of the exercises will always be in the success/failure output.");
 }
diff --git a/exercises/intro/intro2.rs b/exercises/intro/intro2.rs
index 990b20f..d8ec003 100644
--- a/exercises/intro/intro2.rs
+++ b/exercises/intro/intro2.rs
@@ -1,12 +1,9 @@
 // intro2.rs
-//
 // Make the code print a greeting to the world.
-//
-// Execute `rustlings hint intro2` or use the `hint` watch subcommand for a
-// hint.
+// Execute `rustlings hint intro2` or use the `hint` watch subcommand for a hint.
+
 
-// I AM NOT DONE
 
 fn main() {
-    println!("Hello {}!");
+    println!("Hello {}!","dahsdioahsdoafb");
 }
diff --git a/exercises/quiz1.rs b/exercises/quiz1.rs
index a9904b8..ba35706 100644
--- a/exercises/quiz1.rs
+++ b/exercises/quiz1.rs
@@ -1,22 +1,21 @@
 // quiz1.rs
-//
 // This is a quiz for the following sections:
 // - Variables
 // - Functions
 // - If
-//
+
 // Mary is buying apples. The price of an apple is calculated as follows:
 // - An apple costs 2 rustbucks.
 // - If Mary buys more than 40 apples, each apple only costs 1 rustbuck!
-// Write a function that calculates the price of an order of apples given the
-// quantity bought. No hints this time!
-//
-// No hints this time ;)
+// Write a function that calculates the price of an order of apples given
+// the quantity bought. No hints this time!
+
 
-// I AM NOT DONE
 
 // Put your function here!
-// fn calculate_price_of_apples {
+fn calculate_price_of_apples(num:u32)->u32 {
+    if num<=40 { num*2 } else { num }
+}
 
 // Don't modify this function!
 #[test]
diff --git a/exercises/variables/README.md b/exercises/variables/README.md
index 7964ff2..11a7a78 100644
--- a/exercises/variables/README.md
+++ b/exercises/variables/README.md
@@ -2,7 +2,7 @@
 
 In Rust, variables are immutable by default.
 When a variable is immutable, once a value is bound to a name, you can’t change that value.
-You can make them mutable by adding `mut` in front of the variable name.
+You can make them mutable by adding mut in front of the variable name.
 
 ## Further information
 
diff --git a/exercises/variables/variables1.rs b/exercises/variables/variables1.rs
index b3e089a..b0ad72d 100644
--- a/exercises/variables/variables1.rs
+++ b/exercises/variables/variables1.rs
@@ -1,13 +1,9 @@
 // variables1.rs
-//
 // Make me compile!
-//
-// Execute `rustlings hint variables1` or use the `hint` watch subcommand for a
-// hint.
+// Execute `rustlings hint variables1` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
 
 fn main() {
-    x = 5;
+    let x = 5;
     println!("x has the value {}", x);
 }
diff --git a/exercises/variables/variables2.rs b/exercises/variables/variables2.rs
index e1c23ed..1e38130 100644
--- a/exercises/variables/variables2.rs
+++ b/exercises/variables/variables2.rs
@@ -1,12 +1,10 @@
 // variables2.rs
-//
-// Execute `rustlings hint variables2` or use the `hint` watch subcommand for a
-// hint.
+// Execute `rustlings hint variables2` or use the `hint` watch subcommand for a hint.
+
 
-// I AM NOT DONE
 
 fn main() {
-    let x;
+    let x:i32=42;
     if x == 10 {
         println!("x is ten!");
     } else {
diff --git a/exercises/variables/variables3.rs b/exercises/variables/variables3.rs
index 86bed41..b64d8fd 100644
--- a/exercises/variables/variables3.rs
+++ b/exercises/variables/variables3.rs
@@ -1,11 +1,9 @@
 // variables3.rs
-//
-// Execute `rustlings hint variables3` or use the `hint` watch subcommand for a
-// hint.
+// Execute `rustlings hint variables3` or use the `hint` watch subcommand for a hint.
+
 
-// I AM NOT DONE
 
 fn main() {
-    let x: i32;
+    let x: i32=10;
     println!("Number {}", x);
 }
diff --git a/exercises/variables/variables4.rs b/exercises/variables/variables4.rs
index 5394f39..a6e5457 100644
--- a/exercises/variables/variables4.rs
+++ b/exercises/variables/variables4.rs
@@ -1,12 +1,10 @@
 // variables4.rs
-//
-// Execute `rustlings hint variables4` or use the `hint` watch subcommand for a
-// hint.
+// Execute `rustlings hint variables4` or use the `hint` watch subcommand for a hint.
+
 
-// I AM NOT DONE
 
 fn main() {
-    let x = 3;
+    let mut  x = 3;
     println!("Number {}", x);
     x = 5; // don't change this line
     println!("Number {}", x);
diff --git a/exercises/variables/variables5.rs b/exercises/variables/variables5.rs
index a29b38b..14aec8c 100644
--- a/exercises/variables/variables5.rs
+++ b/exercises/variables/variables5.rs
@@ -1,13 +1,11 @@
 // variables5.rs
-//
-// Execute `rustlings hint variables5` or use the `hint` watch subcommand for a
-// hint.
+// Execute `rustlings hint variables5` or use the `hint` watch subcommand for a hint.
+
 
-// I AM NOT DONE
 
 fn main() {
     let number = "T-H-R-E-E"; // don't change this line
     println!("Spell a Number : {}", number);
-    number = 3; // don't rename this variable
+    let number = 3; // don't rename this variable
     println!("Number plus two is : {}", number + 2);
 }
diff --git a/exercises/variables/variables6.rs b/exercises/variables/variables6.rs
index 853183b..b11c799 100644
--- a/exercises/variables/variables6.rs
+++ b/exercises/variables/variables6.rs
@@ -1,11 +1,9 @@
 // variables6.rs
-//
-// Execute `rustlings hint variables6` or use the `hint` watch subcommand for a
-// hint.
+// Execute `rustlings hint variables6` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
 
-const NUMBER = 3;
+
+const NUMBER:i32 = 3;
 fn main() {
     println!("Number {}", NUMBER);
 }
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new file mode 100644
index 0000000..74edff3
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