$6\mathrm{.}22$A $$100$ par value bond maturing in n years with $5\%$ annual coupons is sold at $$103\mathrm{.}3.$ Another bond with an annual coupon rate of $3\%$ but otherwise the same is sold at $$90\mathrm{.}1.$ Both bonds are redeemable at par. Find the write$-$up$/$write$-$down of the book value for the second bond during the fifth year.