please solve a b c$$

Suppose your investment budget is $$300,000$ and you can borrow an

additional $$120,000$ at risk$-$free interest rates. You're trying to

invest all $$420,000$ in risk portfolio P$.($a$)$Calculate the ratio $($y$)$ of the investment budget

invested in risky assets. Calculate the ratio $(1-$y$)$ of the

investment budget invested in risk$-$free assets.$($b$)$Assume that a one$-$year investment in risky assets

results in a return of $$63,000$ while paying interest of $$8,400$ on

the borrowed amount. What is the expected return $($E$($rp$))$ of the

risk portfolio? What is the risk$-$free rate of return $($rf$)?$ Find the

expected return $($E$($rC$))$ for the entire completion portfolio.$($c$)$Suppose the standard deviation of your risk portfolio

is $\backslash$sigma P $=22\%.$ What is the Sharpe ratio of the completed

portfolio?