An account has a nominal interest rate of 2% convertible monthly for the first three years, the nominal rate of discount was 3% payable semiannually for the next two years, the nominal rate of interest was 4.2% compounded once every two years for the next four years, and the annual effective rate of discount was 0.058 after that. a) Find a(t) b) Use your answer from part a) to find the accumulated value of $2480 after 12 years. c) Find v(c). d) Find the value of the account at time 3 if the value of the account is $5000 at time 10. An account has a nominal interest rate of 2% convertible monthly for the first three years, the nominal rate of discount was 3% payable semiannually for the next two years, the nominal rate of interest was 4.2% compounded once every two years for the next four years, and the annual effective rate of discount was 0.058 after that. a) Find a(t) b) Use your answer from part a) to find the accumulated value of $2480 after 12 years. c) Find v(c). d) Find the value of the account at time 3 if the value of the account is $5000 at time 10