9. What is the size of the password space if we permit passwords to consist only of:

(a) eight alphabetic characters (not case sensitive);

(b) eight alphabetic characters (case sensitive);

(c) six alphanumeric characters (case sensitive);

(d) eight alphanumeric characters (case sensitive);

(e) ten alphanumeric characters (case sensitive);

(f) eight alphanumeric characters and keypad symbols (case sensitive)