Code not working for any of these questions. It would be helpful to see someone elses.

Q1. Write a MIPS program that prompts the user to enter 3 characters and then displays them in reverse order. Sample run Enter three characters: xyz Your characters in reverse order: zyx Q2. Write a MIPS program that prompts the user to enter a 3-digit decimal number and finds the sum of the 3 digits. Assume the user enters valid input. Hint: what is the hex decimal value for ASCII '0'? Sample run Enter a 3 digit number: 999 The sum of the 3 digits is: 27 Q3. Write a MIPS program that prompts the user to enter a 3-digit hex number, where all digits are from A-F (capital letters only), and then displays the decimal equivalent. Assume the user enters valid input. Hint: what is the hex decimal value for alphabets? Sample run Enter a 3-digit hex number (all digits must be from A to F): ABC The decimal equivalent is: 2748