please answer all the questions .Thanks

8. Bob got a 30 year Fully Amortizing FRM for $1,500,000 at 4%, except with non-constant payments. For the first 2 years Bob will pay $1.250 per month. The loan will become a fully amortizing mortgage after 2 years. Wha will be the balance on this mortgage after 2 years? 9. Tom got a 30 year fully amortizing FRM for S500,000 at 8%, with constant monthly payments. After 3 years of payments rates fall and he can get a 27 year FRM at 5%, but he must pay 7 points and S20000 in closing costs to get the new loun. Think of the refinancing decision as an investment for Toth, he puys a fee now but saves money in the future in the form of lower payments. What is the IRR of refinancing for Tom assuming he stays until maturity? 10. In 09, what is the IRR of refinancing for Tom assuming he prepuys the new loun 5 years after refinancing!! (Clarification: Tom will prepay the new loan 3.5-8 years after the house is purchased)