finite Math 200 Question Help

1. From the letters a, b, c, d, and e, how many four-letter groups can be formed if each letter can be used more than once? 524 b. each letter can be used no more than once? 2. Five women and four men are to be seated in a row of nine chairs. How many different seating arrangements are possible if a. there are no restrictions on the seating arrangements? b. the women sit together and the men sit together? 3. From a standard 52-card deck of playing cards, five cards are chosen at random. How many five-card groups contain a. two kings and three queens? b. five hearts? c. five cards of the same suit