Assignemnt

1. Write a Perl function that takes in a password and checks whether it's valid. The password should follow the following rule: Passwords must be at least 8 characters long. Between 8-11: requires mixed case letters, numbers and symbols Between 12-15: requires mixed case letters and numbers Between 16-19: requires mixed case letters 20+: any characters desired 2. Parentheses removal function. Given a string containing an expression, return the expression with unnecessary parentheses removed in Java For example: f("1*(2+(3*(4+5)))") ===> "1*(2+3*(4+5))" f("2 + (3 / -5)") ===> "2 + 3 / -5" f("x+(y+z)+(t+(v+w))") ===> "x+y+z+t+v+w"