3.Write a function called isEven that takes a number as a parameter and returns true if the number is even and false if it is odd. 4.Write a function called isOdd that takes a number and returns true ...

We can start by writing unit tests for functions. Suppose you have the following `functions.js`. function add2(a, b) { return a + b } function add3(a, b, c) { return add2(add2(a, b), c) } function ...