(a) To log on to a certain computer account, the user must type in a 5letter password. In such a password, no letter may be repeated, and only the lower case of a letter may be used. How many such 5letter passwords are possible? (There are 26 letters in the alphabet.) D (b) From the 12 albums released by a musician, the recording company wishes to release 9 in a boxed set. How many different boxed sets are possible? [I