The following table summarizes prices of various default$-$free zero$-$coupon bonds $($ $$100$ face value$)$: $($Click on the

following icon $$ in order to copy its contents into a spreadsheet.$)$

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?

Note: Assume annual compounding.

a$.$ Compute the yield to maturity for each bond.