Tweaks and fixes

Good job, Mike. :sparkles: 

Here are my comments:

#### Exercise 7

Don't forget about the double-quotation marks `" "` around the `response` string.

#### Exercise 8

I have to take off 1 point because the alignment of the output is different from the sample output. I've included my solution so you can compare.

`puts` is considered a "keyword" method so it doesn't need parenthesis. :wink:

`puts` doesn't need any arguments to display a blank line. :zap: