Assignment Problem: A password is a string of 8 characters taken from the alphabet (that is, the set of 26 characters {a, b, c, ..., x, y, z}), the set of 10 digits {0, 1, 3, 4, 5, 6, 7, 8, 9} and the set of 5 special characters {!, @, #, ∗, +}.
Q1. How many unique passwords are there where you can repeat characters and there are at least 2 digits?
Q2. How many unique passwords are there where you can repeat characters and have at least 2 digits and at least 1 special character?