3. Create password complexity policy function (named "complexity _function"). The password policy will enforce the following complexity so that the password: (4 marks) o Is at least six (6) characters long o Differs from the user name o Has at least one alpha, one numeric, and one punctuation mark character o Is not simple or obvious, such as welcome, account, oracle, database, or user. o Differs from the previous password by at least 3 characters