A. It says “If Nancy is having a birthday then joe will buy her a card” it could Also be C. But it says “if joe buys Nancy a card he will GIVE IT TO HER” not just buying it so the most likely answer is A
I am not 100% positive but from what I remember learning I think the answer you are looking for on the first question is C.
If you were to reverse it it would be 7/6, but if you need it in another form, tell me.
The length of the base is 24 cubic inches