Question $4(1$ point$)$

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A complete portfolio with an expected return of $12\%$ is composed of Treasury bills and a risky portfolio $P$ of two stocks, $x$ and $Y.$ The weight of $x$ in $P$ is $40\%.$ The T$-$bill rate is $5\%,$ while the expected returns of $x$ and $Y$ are $18\%$ and $25\%,$ respectively. What is the weight of T$-$bills in the complete portfolio?

$39\mathrm{.}7\%$

$43\mathrm{.}3\%$

$51\mathrm{.}8\%$

$59\mathrm{.}3\%$