$10\mathrm{.}2.$ On $6/30/$A$,$ Carril Co$.$ purchases $10$ shares of Co$.$ A stock for $$4$ each. At $\frac{12}{31}\frac{?}{A},$ the firm's fiscal year$-$end, Co$.$ A is trading at $$\frac{10}{?}$ share. On March $15,$ year B$,$ half of the Co$.$ A stock is sold for $$7.$ On $12/31/$B$,$ Co$.$ A stock was trading at $$9/$share$.$ Provide the information requested below, assuming the investment is correctly classified as a trading security $($TS$).$

a$.12/31/$A unrealized gain$($loss$)$

$-$

b$.$ Year B realized gain$($loss$)$ reported on the year B income statement

$-b$

c$.$ Unrealized gain$($loss$)$ reported on the year B Income Statement $[$ck: a$.60$ b$.(15)$ c$.(5)]$