The cash prices of six$-$month and one$-$year Treasury bills are $94\mathrm{.}0$ and $89\mathrm{.}0.$ A $1\mathrm{.}5-$year bond that will pay coupons of $$4$ every six months currently sells for $$94\mathrm{.}84.$ A two$-$year bond that will pay coupons of $$5$ every six months currently sells for $$97\mathrm{.}12.$ Calculate the six$-$month, one$-$year, $1\mathrm{.}5-$year, and two$-$year zero rates