In a standard deck of 52 cards, there are 4 suits: clubs, diamonds, hearts and spades. For each suit, there are 13 numbers ranging from A (Ace), 2, 3, ..., 10, J (Jack), Q (Queen), K (King). In the game Bridge, each player gets 13 cards from a standard deck of 52 cards. What is the probability that a. all 13 cards have the same suit? b. the 4 aces are part of the 13 cards? c. none of the 13 cards have the same number? d. exactly seven of the 13 cards are spades? e. at least seven of the 13 cards are spades