Need help with the second question with explanation please.

What is the present value of a stream of 5 end-of-year annual cash receipts of $2,700 given a discount rate of 20%? a. Use the appropriate table (Appendix C: Table 1, Table2) to answer the above question. (Round your answer to 2 decimal places.) PV of annuity s 8,075.70 b. Use the appropriate built-in function in Excel to answer the above question. (Round your final answer to 2 decimal places.) PV of annuity