Could I have this done through Excel please?

7- A used car dealer advertises financing at 0% interest over 3 years with monthly payments. You must pay a processing fee of $500 at 41 signing. The car you like costs $9000. (a) What is your effective annual interest rate? (b) You believe that the dealer would accept $8200 if you paid cash. What effective annual interest rate would you be paying, if you financed with the dealer