FINANCE-What is an annuity? Discuss why it is considered a tax-sheltered investment

Question
a)What is an annuity? Discuss why it is considered a tax-sheltered investment. What do you have to give up in order to receive tax-favored treatment? (40 points total)(Points : 40)

b) Your bank is offering 5.5% fixed-rate mortgage, requiring a down payment equal to 10% of the home’s purchase price. The lender estimates that closing costs should equal $750 plus three points. How much will closing costs be on a $200,000 home? (15 points)
What are the pros and cons of fixed and adjustable rate loans? (20 points) (35 points total) (Points : 35)