Calculate the following. 

$9250 is invested for 7 years at the following interest rates: J2 = 9% for the first 2 years; 4 = 4.5% for the next 3 years (following the first 2 years); and 52 7.5% for the final 2 years. a) Determine the accumulated value of the investment after 7 years. Answer: $ b) What equivalent nominal rate, j365, was earned over the 7-year period? Answer: %