please help me with these 2 questions. thanks

JamesBond Corporation issued 10-year bonds two years ago. The coupon rate on these bonds is 7.8 percent. The bonds make semiannual coupon payments. Today you can buy each of these bonds for 108 percent of par value. Calculate the YTM. (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Eternity Insurance is selling a perpetuity contract that pays $1,350 monthly. The contract currently sells for $62,000. a. Calculate the monthly rate of return on this investment. b. Calculate the APR. c. Calculate the effective annual rate