Rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 14 month period, the last term is and the series sum is . for a 16 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is .

Which account has the highest effective annual interest rate? not necessary but show how you got your answer.a. account 1: interest is compounded quarterly at an annual rate of 4.20%.b. account 2: interest is compounded monthly at an annual rate of 4.15%.c. account 3: interest is compounded semiannually at an annual rate of 4.10%d. account 4: interest is compounded annually at a rate of 4.25%.