Grade for Class 5 Assignment

Good job, Colin.

#### Exercise 1

- No crashes, works as expected. 4 points
- Here's an example of a `build_playlist` method that contains all the logic. It may be useful for exercise 2...

#### Exercise 2

- No crashes, but does't work as expected. 3 points
- Too many issues to list so study my solution. What's different about it?

#### Exercise 3

- No crashes, but does't work as expected. 3 points
- I hate taking off points from working programs that don't have the same output as the sample output :sweat: 
- Don't worry about `to_s` or `downcase` on `ARGV` elements.

#### Total

`4 + 3 + 3 = 10`