You are creating a 4 digit pin code, where each digit is chosen from 0-9. How many choices are there if a) There are no restrictions. b) No digit is repeated. c) No digit is repeated, the second digit is a 3. d) The ending pin is a number greater than 5,000. From a standard deck of cards, find the probability of a) Drawing a spade or an ace. b) Drawing two cards without replacement, and getting two kings