The following table summarizes prices of various default-free zero-coupon bonds (expressed as a percentage of the face value):

Maturity (years)	1	2	3	4	5
Price (per $100 face value)	$95.2795.27	$90.8890.88	$86.3686.36	$81.6481.64	$76.4576.45

a. Compute the yield to maturity for each bond.

b. Plot the zero-coupon yield curve (for the first five years).

c. Is the yield curve upward sloping, downward sloping, or flat?