I need help with 7-10, please.

7. A bond will pay $25 every six months for the next three years. At the end of the third year, you will receive principal of $1000 in addition to the coupon What is the present value of the bond, assuming r = .08? 8. What is the present value of an annuity paying $1000 annually for five years, beginning in 10 years. Assume an interest rate of 10% and annual compounding Sort 9. If Jason graduates from UNCC at the age of 21 and begins saving $300 a month at a rate of 7% compounded monthly, how much will he have saved by the age of 31? more 10. At the age of 31 Jason takes 50,000 of his savings and makes a 20% down payment on a $250,000 new house. He gets a 6.5% fixed rate, 30 year mortgage from Community Bank of Charlotte. What are his monthly payments? 12.00