Jack is doing a card trick with his deck of cards (it is a standard 52-card deck, but it is missing the queen of hearts and the two of clubs). He asks his friend Amy to pull out a card look at it and put it back, he then asks Ben and then Cam to do the same thing.

A. What is the probability that Amy pulls out either an ace or a spade?

B. What is the probability that Ben pulls out a heart given that Amy pulls out a heart?

C. What is the probability that Cam pulls out a black 7?

D. What is the probability that all three of Jack's friends pull out a heart?