True or false Suppose that Frank cosigned a note that his friend Katherine gave to the credit union to secure a loan. The note was originally for $$5,000$ and payable in twelve $(12)$ months with an interest rate of eleven $(11)$ percent per year. The credit union and Katherine later agree that Katherine will have eighteen $(18)$ months to repay the note and that the interest rate will be fourteen $(14)$ percent per year. Unless Frank consents to the change, he is discharged from his responsibility as surety.