Twenty-six slips of paper are each marked with a different letter of the alphabet and placed in a basket. A slip is pulled out, its letter recorded (in the order in which the slip was drawn), and the slip is replaced. This is done 5 times. Find the probabilities that the following "words" are formed.

A word that starts with "p"

What have you done so far on this problem?

What have you done so far on this problem?

To be honest I do not even have a clue to how to set the problem up...