Imagine you are developing a software package for Amazon.com that requires users to enter their own passwords. Your software requires that users passwords meet the following criteria:

The password should be at least six characters long.

The password should contain at least one uppercase and at least one lowercase letter.

The password should have at least one digit.

The name of the project should be PasswordVerifierDemo.java. Write a class named PasswordVerifier that verifies that a password meets the stated criteria. The definition of the class PasswordVerifier should be included in the same file. Demonstrate the class in a program that allows the user to enter a password and then displays a message indicating whether it is valid or not.