Claudius took out an unsubsidized Stafford loan at the beginning of his six-year college career. The loan had a principal of $4,850, an interest rate of 6.5% compounded monthly, and a duration of ten years. If Claudius started paying off the loan when he graduated, what is his monthly payment? Round all dollar values to the nearest cent. a. $71.37 b. $81.25 c. $55.07 d. $76.55