Answered all the question including the STRETCH problem

index.js

@@ -44,7 +44,23 @@ class Airplane {
 */
 
 class Person {
-
+  constructor(name, age){
+    this.stomach = [];
+    this.name = name;
+    this.age = age;
+  }
+  eat(someFood) {
+    if(this.stomach.length < 10)
+    {
+      this.stomach.push(someFood);
+    }
+  }
+  poop() {
+    this.stomach = [];
+  }
+  toString(){
+    return `${this.name}, ${this.age}`;
+  }
 }
 
 /*
@@ -62,7 +78,26 @@ class Person {
 */
 
 class Car {
-
+  constructor(model, milesPerGallon) {
+    this.model = model;
+    this.milesPerGallon = milesPerGallon;
+    this.tank = 0;
+    this.odometer = 0;
+  }
+  fill(gallons){
+    this.tank += gallons;
+  }
+  drive(distance){
+    let maxDistance = this.tank * this.milesPerGallon;
+    if (maxDistance > distance){
+      this.odometer += distance;
+      this.tank = this.tank - (distance / this.milesPerGallon).toFixed(2);
+    } else {
+      this.odometer += maxDistance;
+      this.tank = 0;
+      return `I ran out of fuel at ${this.odometer} miles!`;
+    }
+  }
 }
 
 /*
@@ -79,7 +114,14 @@ class Car {
 */
 
 class Lambdasian {
-
+  constructor(arg){
+    this.name = arg.name;
+    this.age = arg.age;
+    this.location = arg.location;
+  }
+  speak(){
+    return `Hello my name is ${this.name}, I am from ${this.location}`;
+  }
 }
 
 /*
@@ -97,7 +139,23 @@ class Lambdasian {
         + `grade` receives a `student` object and a `subject` string as arguments and returns '{student.name} receives a perfect score on {subject}'
 */
 
-class Instructor {
+class Instructor extends Lambdasian{
+  constructor(arg){
+  super(arg);
+  this.specialty = arg.specialty;
+  this.favLanguage = arg.favLanguage;
+  this.catchPhrase = arg.catchPhrase;
+  }
+  demo(subject){
+    return `Today we are learning about ${subject}`
+  }
+  grade(student, subject){
+    return `${student.name} receives a perfect score on ${subject}`;
+  }
+  randomGrade(grade){
+    let randomNumber = Math.floor(Math.random() * (10 - (-10)) + (-10));
+    return grade += randomNumber;
+  }
 
 }
 
@@ -117,8 +175,31 @@ class Instructor {
         + `sprintChallenge` similar to PRAssignment but returns `student.name has begun sprint challenge on {subject}`
 */
 
-class Student {
-
+class Student extends Lambdasian{
+   constructor(arg){
+    super(arg);
+    this.previousBackground = arg.previousBackground;
+    this.className = arg.className;
+    this.favSubjects = arg.favSubjects;
+    this.grade = arg.grade;
+   }
+   listSubjects(){
+    return `Loving ${this.favSubjects}`;
+   }
+   PRAssignment(subject){
+    return `${this.name} has submitted a PR for ${subject}`;
+   }
+   sprintChallenge(subject){
+    return `${this.name} has begun sprint challenge on ${subject}`;
+   }
+   graduate(){
+    if (this.grade > 70)
+    {
+      return `You are ready to graduate!`;
+    } else {
+      return `You still need to increase your grade in order to graduate!`;
+    }
+   }
 }
 
 /*
@@ -135,8 +216,18 @@ class Student {
         + `debugsCode` a method that takes in a student object and a subject and returns `{name} debugs {student.name}'s code on {subject}`
 */
 
-class ProjectManager {
-
+class ProjectManager extends Instructor{
+   constructor(arg){
+    super(arg);
+    this.gradClassName = arg.gradClassName;
+    this.favInstructor = arg.favInstructor;
+   }
+   standUp(channel){
+    return `${this.name} announces to ${channel}, @channel standy times!`;
+   }
+   debugsCode(student, subject){
+    return `${this.name} debugs ${student.name}'s code on ${subject}`;
+   }
 }
 
 /*