1.
function wasItFunny(response) {
  if(response !== 'funny'){
    return 'meh';
  }else if(response === 'funny'){
    return 'HAHAHA';
  }

}
var result = wasItFunny('funny');
console.log(result);

2.
function isWordLong(word) {
  if(word.length > 15){
    return true;
  }else if(word.length <= 15){
    return false;
  }

}
var result = isWordLong('absentmindedness');
console.log(result);

3.
function addFourNums(numA, numB, numC, numD) {
return numA + numB + numC + numD;
}
var result = addFourNums(10, 20, 30, 40);
console.log(result);

4.
function addOnlyFirstFourNums(numbers) {
var sum = 0;
  var newArr = numbers.slice(0,4);
  for(var i = 0; i < newArr.length; i++){
           sum += newArr[i];

  }
return sum;
}
var result = addOnlyFirstFourNums([40, 600, 8000, 2, 19, 25, 60, 90]);
console.log(result);
5.
function convertInchesToCentimeters(inches) {
  return inches * 2.54;

}
var centimeters = convertInchesToCentimeters(120);
console.log(centimeters);

6.
function myFavoriteSong() {
  console.log(obj);
}
var obj = {
  title: "Countdown",
  artist: "Beyonce",
  durationInSeconds: 212
}
console.log(myFavoriteSong());

7.
function isItExpensive(item) {
 if(item['price'] < 100){
   return false;
 }else if(item['price'] === null){
   return 'no data';
 }else if(item['price'] >= 100){
   return true;
 }
}
var appleWatch = {price: 400};
var applesAndWatches = {price: 30};
var watchingApples = {price: null};
var result1 = isItExpensive(appleWatch);
var result2 = isItExpensive(applesAndWatches);
var result3 = isItExpensive(watchingApples);
console.log(result1);
console.log(result2);
console.log(result3);


8.
function introduceMe(name, numPets) {
  return "Hi I am " + name + " and I have " + numPets + " pet(s)";

}
var result = introduceMe("Hui Zheng", 0);
console.log(result);

9.
function nextTwoBusTimes(timesArr) {
  var str = '';
for (var i = 0; i < timesArr.length; i++){
  var firstTime = timesArr[i];
  var secondTime = timesArr[i + 1];
  str += "The next 2 busses arrive in " + firstTime + " and " + secondTime + " minutes.";
  return str;

}
}
var bus10Schedule = [12, 24, 35, 47, 60];
var result = nextTwoBusTimes(bus10Schedule);
console.log(result);

10.
function nextAndLastBusTimes(timesArr) {
  var str = '';
for(var i = 0; i < timesArr.length; i++){
  var firstTime = timesArr[i];
  var lastTime = timesArr[timesArr.length - 1];
  return str += "The next bus is in " + firstTime +  " minutes. The last bus is in " + lastTime + " minutes.";

}
}
var bus10Schedule = [12, 24, 35, 47, 60];
var result = nextAndLastBusTimes(bus10Schedule);
console.log(result);