A $$25000,6\%$ bond redeemable at par is purchased $11$ years before maturity to yield $6\mathrm{.}9\%$ compounded semi$-$annually. If the bond interest is payable semi$-$annually, what is the purchase price of the bond? a$$26845\mathrm{.}32$ b$$23285\mathrm{.}32$ c$$11845\mathrm{.}32$ d$$26285\mathrm{.}32$