$10.$ You had $$3,000$ cash deposit in the margin account. You borrowed $200$ shares of Doggie Treats Inc. stock from the broker and sold them at $$25$ per share. The broker requires a $25\%$ maintenance margin. At the end of the year, Doggie Treats Ine. will pay a year$-$end dividend of $$0\mathrm{.}5$ per share$\mathrm{.}1)$ If stock price drops to $$20$ next year after the dividend payment, what will be the return rate of your deposited money? $(6$ points$)$