There are 52 cards in a standard deck of cards, with four suits: hearts, clubs, diamonds, and spades. Each suit has 13 cards: ace, 2, 3, 4, 5, 6, 7, 8, 9, 10, jack, queen, king. Let event A be choosing a 7 out of a standard deck of cards. Identify the numbers of each of the following. Enter the probability as a fraction:
a) Favorable outcomes: 4, Total outcomes: 52
b) Favorable outcomes: 4, Total outcomes: 13
c) Favorable outcomes: 7, Total outcomes: 52
d) Favorable outcomes: 7, Total outcomes: 13