You decide to invest $$50,000$ in a risky and risk$-$free portfolio. The risky asset has an expected rate of return of $11\%$ and standard deviation of $21\%.$ The risk$-$free T$-$bill has a rate of return of $4\mathrm{.}5\%.$ Assume you are average risk aversion $($coefficient A $=3).$ The optimal complete portfolio should invest $\_\_\_\_\_\_\_\_\_$ in risky asset.