You are developing a password validation tool in Python and need to use regular expressions to ensure the passwords meet certain criteria. Write Python code that accomplishes the following: a. Import the re module for regular expressions. b. Ask the user to enter a password. c. Use regular expressions to check if the entered password is valid according to the following requirements: 1. The password should be at least 8 characters long. 2. It should contain a mix of uppercase and lowercase letters. 3. It should include at least one digit. 4. It should include at least one special character (e.g., @, #, $, %, etc.). 5. No spaces are allowed in the password. d. Print "Valid password" if the entered password is valid; otherwise, print "Invalid password." Example Output: Enter a password: MyP@ssword Valid password Enter a password: 12345 Invalid password Enter a password: Password Invalid password Enter a password: Secret123 Invalid password Enter a password: P@$$word! Valid password