If you put $7,000 in a savings account that pays interest at the rate of 3 percent

If you put $7,000 in a savings account that pays interest at the rate of 3 percent, compounded annually,
how much will you have in 7 years? Round the answer to the nearest cent. Round FV-factor to three decimal places or use the Appendix B.
(Hint: Use the future value formula.) 

how much interest will you earn during the 7 years? Round the answer to the nearest cent. 

If you put $7,000 at the end of each year into a savings account that pays interest at the rate of 3 percent a year, how much would you have after 7 years? Use the Appendix B. Round the answer to the nearest cent. Round FV-factor to three decimal places.