(i) how many different poker hands can be dealt to a player?

(ii) how many hands include the Ace of spades?

(iii) how many hands do not contain include the ace of spades?

(iv)how many hands include all 4 aces?

(v) how many hands contain exactly 3 aces?

so i know that there are 52 cards in a pack and that a poker hand is 5 cards, so the answer to (i) is 52 choose 5^{52}C_{5 , }using the calculator i get 2598960.

and i know that there is only one ace of spades in a pack of cards but i'm not quite sure how to work out part (ii) and if i knew the answer to this then obviously i could work out the answer to part (iii)

could anyone give me a bit of help please? thanks.