Poker, in the deck 52 cards, hand of 5 cards, one of the winning hands is flush, all cards belong to a common suit.
A) Calculate the number of possible combinations of poker hands
B) Calculate a probabilty of flush
C) Calculate a probabilty of getting 4 aces on one hand
D) calculate a probabilty of getting 2 aces or 2 kings
e) Calculate a probability of getting royal flush: A,K,Q,J,10 in each suit