Three years ago, Sophia purchased $350$ shares of stock in Q Corporation for $$26,600.$ On September $15$ of year $4,$ Sophia sells the $350$ shares for $$29,500.$

Part$-$a

a$.$ What is Sophia's capital gain or loss from the sale on September $15$ of year $4?$

Part$-$b

b$.$ Assuming Sophia has no other capital gains or losses, except that on July $10$ of year $5,$ Sophia purchases $350$ shares of Q Corporation stock for $$28,200.$ How much gain or loss from the sale on September $15$ of year $4$ is taxable on Sophia's year $4$ tax return?

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