Write a MIPS program that asks the user for a string and validates it as a password according to the rules given below. If the user enters a blank line $($New Line character $\text{'}\frac{?}{?}\text{'}$ as the first byte$)$ the program exits. Otherwise, it should continue asking for passwords and validating them. Note that the user can type anything, so you must check for validity.

Rules:

Passwords must be a minimum of $8$ characters long.

They must contain at least one upper$-$case letter.

They must contain at least one lower$-$case letter.

They must contain at least one digit $(0-9)$

They must not contain any characters which are not alphanumeric $($ie$,$ anything which is not an upper$-$case letter, lower$-$case letter, or digit$).$

Output text for valid and invalid passwords:

If the entered password is valid, output "Valid password."

If the entered password is missing a digit, output "Invalid password $-$ missing

digit."

If the entered password is missing an upper$-$case letter, output "Invalid password$-$missing uppercase letter."

If the entered password is missing a lower$-$case letter, output "Invalid password $-$ missing lowercase letter."

If the entered password is too short, output "Invalid password $-$ length too

short: $"$ followed by the length of the entered password and a period character.

If the entered password contains an invalid character, output "Invalid password $-$

invalid character: "followed by the invalid character and a period character. If an

entered password contains multiple invalid characters, only print the first one encountered.

Don't do everything in the program loop. Write little functions as needed.