you must show all of your work by setting up the problem using combinatorics.
the security department has decided that passwords must now be 8 characters. they are considering two scenarios. calculate how many unique passwords can be generated with each scenario.
scenario 1: the allowable characters include 26 upper case letters, 26 lower case letters, 10 digits, and four special characters @,#,& ). repetition is permitted. how many unique passwords can be generated?
scenario 2. no repetition is permitted. for the first five characters in the password, the allowable characters include 26 upper case letters, 10 digits, and the four special characters. however, the last three characters must be lower case letters. how many unique passwords can be generated?