I got 5 (Species C at least) and 6 right just in the nick of time!
The structures were right - but what I forgot to do was deuterate the Hydrogen by the methyl group for both of them...
The structure I got for Species A was actually supposed to be Species C.
And it looks like this:
Question 5)Species A:
Species B:
Species C:
Question 6)!
I feel like I'm slowly getting better at Organic Chem