can someone help on these problems

A passbook savings account has a rate of 7%. Find the effective annual yield, rounded to the nearest tenth of a percent, if the interest is compounded semiannually. The effective annual yield is D%. (Round to the nearest tenth as needed.) a. Use the appropriate formula to find the value of the annuity. b. Find the interest. Periodic Deposit Rate Time $4000 at the end of each year 4.5% compounded annually 40 years i Click the icon to view some finance formulas. a. The value of the annuity is $. (Do not round until the final answer. Then round to the nearest dollar as needed.)