a. Use the appropriate formula to find the value of the annuity. b. Find the interest. Periodic Deposit Rate Time $90 at the end of every six months 6.5% compounded semiannually 40 years Click the icon to view some finance formulas. xm a. The value of the annuity is $ W SO Formulas (Do not round until the final answer. Then round to the nearest dollar as needed.) b. The interest is $ ty is (Use the answer from part (a) to find this answer. Round to the nearest dollar as needed.) ala rt (a In the provided formulas, P is the deposit made at the end of each compounding period, r is the annual interest rate of the annuity in decimal is the number of compounding periods per year, and A is the value of the after t years. P[(1+-1] A= A = P = A