Capital Allocation Line and Negative Expected Returns $(40$ points$)$ Question X$\mathrm{.}1$: $(5$ points$)$ calculate expected return and variance for risky and riskless Question X$\mathrm{.}2-(5$ points$)$ plot and draw the associated CAL Question X$\mathrm{.}3$: $(10$ points$)$ what is the Sharpe ratio, and what does it tell us about optimal risky asset allocation here suppose you have the following borrowing constraints $-\backslash (\backslash$$ $1,000,000\backslash )$ in capital $-$ minimum initial margin requirement of $\backslash (50\backslash \%\backslash )$ for the risky asset and $\backslash (10\backslash \%\backslash )$ for the risk$-$free asset $($you can borrow up to $\backslash (50\backslash \%\backslash )$ for risky and $\backslash (90\backslash \%\backslash )$ for risk$-$free if you want$)$ Question X$\mathrm{.}4$: $(15$ points$)$ what is the portfolio that maximizes your expected return under these constraints, and what is the expected return and st dev of your portfolio Question X$\mathrm{.}5$: $(5$ points$)$ if you had no margin or capital requirements $($you can borrow as much as you want$),$ what is the optimal capital allocation?