$6)$ On March $31,2020,$ Mr$.$ David $$an investor and one of Spahr cosmetics bondholders$$ wanted to sell the bonds that he acquired back in $2015.$ What would be the current market price for the bond assuming the following term structure of similar$-$risk bonds?

time to maturity

$10$ years

$15$ years

$20$ years

YTM

$4\%$

$6\%$

$8\%$

a$)$ $ $901\mathrm{.}99$

b$)$ $ $943\mathrm{.}20$

c$)$ $ $518\mathrm{.}23$

d$)$ $ $940\mathrm{.}31$