please let me im stuck for all of them

1) You just won a contest! You will receive $500 a month for 30 years, starting today. If you can earn 6 percent on your investments, what are your winnings worth today? Answer: 2) Downtown Insurance offers an ordinary annuity with monthly payments for 30 years at 6 percent interest. The annuity costs $500,000 today. What is the amount of each annuity payment? Answer: 3) Given the following information, compute the instrinsic value of Company X. Also, construct a data table that shows how the value of the stock will change if the ROE change between 8% and 16%, in 1% increments. AND the plowback ratio changes between 20% and 60%, in 5% increments