Calculate the value of each of the followings at the end of month 28. Keep at least 4 significant figures for rates

a. $250 every three years forever, starting at month 9, interest rate is 1% per month.

b. $330 per quarter for 18 quarters, starting at month 7, interest rate is 8% compounded semi-annually.

c. $200 per month for 60 months, starting at quarter 3, grows at 2% per month, interest rate is 18% compounded continuously.

d. $500 every two months forever, starting at the beginning of year 7 and grow at 3% per quarter, interest rate is 16% per year.

PLEASE SHOW STEPS.