Suppose a 6-character password needs to be made using any of the letters A, X, Q, F, R, P and odd numbers between 0-10. How many passwords exist if:

Suppose a 6-character password needs to be made using any of the letters A, X, Q, F, R, P and odd numbers between 0-10. How many passwords exist if:a) any combination of these characters is allowed, and characters can be repeatedb)repetition is not allowedc)alternate characters need to be letters or numbers, and repetition is not allowed