5.1.1.js

function sayHello(name) {
  console.log(`Hello, ${name}`);
};

function areBothEven(a, b) {
  return ((a % 2 == 0) && (b % 2 == 0))
}

function hotOrNot(temp) {
  return (temp > 75) ? "hot" : "not"
}

function threeIfNull(num) {
  if (typeof num === 'undefined')
    return 3
  else
    return num
}

function greatest(x, y, z) {
  return  Math.max(x, y, z)
}