coupon yield curve for risk-free bonds

1-Consider a zero-coupon bond with a $1000 face value and 10 years left until maturity. If the YTM of this bond is 10.4%, then the price of this bond is closest to:
$1000
$602
$1040
$372

2-Use the following information to answer the question(s) below. Suppose the current zero-coupon yield curve for risk-free bonds is as follows: The price per $100 face value of a three-year, zero-coupon, risk-free bond is closest to:
$93.80
$90.06
$89.1
$86.39

3-Use the information for the question(s) below. The Sisyphean Company has a bond outstanding with a face value of $1000 that reaches maturity in 15 years. The bond certificate indicates that the stated coupon rate for this bond is 8% and that the coupon payments are to be made semiannually. How much will each semiannual coupon payment be?
Answer
$60
$40
$120
$80

4-Consider the following investment alternatives:
Investment compounding
A 6.25% annually
B- 6.10% daily
C- 6.125 quarterly
D- 6.120 monthly
1-Which alternative offers you the lowest effective rate of return?
Investment A
Investment B
Investment C
Investment D