a.) a standard automobile license plate in a country display 1 number, followed by 3 letters, followed by 3 numbers. How many different standard plates are possible in this system? (Assume repetitions of letters and numbers are allowed.

b.) How many different ways can a race with 4 runners be completed? (Assume there is no tie)

c.) In how many ways can 4 pizza toppings be chosen from 12 available toppings?

d.) How many different 2 card hands can be dealt from a deck of 52 cards?