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

$$11845\mathrm{.}32$

b

$$26845\mathrm{.}32$

c

$$26285\mathrm{.}32$

d

$$23285\mathrm{.}32$