Calculate the interest $($in $$),$ purchase price $($in $$),$ and effective interest rate $($as a $\%)$ of the Treasury bill $($T$-$bill$)$ purchase. Round effective interest rate to the nearest hundredth of a percent.

Face

Value Discount

Rate $(\%)$ Term

$($weeks$)$ Interest Purchase

Price Effective

Rate $(\%)$

$$80,000($face value$)4\mathrm{.}20($discount rate $(\%)),26($term weeks$)$