Please answer with excel formula. Thanks.

1. What is the implied discount rate in an annuity product that costs $50,000 today and pays the owner twenty annual payments of $3,000 ? hint: you need to use the Excel RATE function and enter the payment as a negative number. 2. How many months will it take to pay off a $10,000 balance on a credit card that has an APR of 18%, assuming you charge no additional money on the card and make regular monthly payments of \$175? hint: you need to use the Excel NPER function and enter the payment as a negative number. 3. What is the monthly payment on a $200,00030-year 6% fixed rate mortgage? 4. How much money will you have in twenty-five years if over that period you make monthly deposits of $300.00 into an investment account that earns an APR of 6% over that period? 5. Assuming a discount rate of 7%, how much money should you be willing to pay for an investment that will generate annual cash flows of $12,000 per year for ten years