please give a written explanation for each of these questions as well. thanks

$11,350 accumulates to $13,500 in 1 years. What is the effective annual interest rate? A. 12.08% B. 17.73% C. 18.94% D. 19.20% 5. Evaluate 10Qzo at 3.25%. A. 9.56 B. 10.56 C. 11.56 D. 12.56 6. A 5-year $1000 bond has a 6% coupon rate convertible semiannually. It is callable in 2 years. At what price should the investor buy the bond to yield 6.2% convertible semiannually. A. $885.30 B. $916.16 C. $955.69 D. $991.51 7. Find an expression for the convexity of the cashflows arising from a lump sum deposited in a bank account that pays simple interest at a constant rate at the end of each year. Assume that the lump sum is invested for an indefinite term