A password can be made of digits (0 - 9), lower case letters (a - z) and the following set of special characters (-;&, -, !, %, #}. Compute the number of passwords that satisfy the given constraints. 1) Strings of length 6. Characters can be special characters, digits, or letters. 2) Strings of length 6, 7, or 8. Characters can be special characters, digits, or letters. 3) Strings of length 6, 7, or 8. Characters can be special characters, digits, or letters. The first character cannot be a letter