Interest premium. Estimate the default premium and the maturity

premium given the following three investment opportunities: a Treasury bill

with a current interest rate of $3\mathrm{.}5\%,$ a Treasury bond with a twenty$-$year

maturity and a current interest rate of $5\mathrm{.}5\%,$ and a AAA corporate bond

with a twenty$-$vear maturity and an interest rate of $7\mathrm{.}0\%.$