MSFT has an expected return E$($x$)$ of $0\mathrm{.}13$ and a standard deviation sigma of $0\mathrm{.}21$

WMT has an expected return $E(x)$ of $0\mathrm{.}17$ and a standard deviation sigma of $0\mathrm{.}25$

The correlation between M SFT and WMT is $0\mathrm{.}52$

Compute the standard deviation of the portfolio if you invest a fraction $0\mathrm{.}19$ into MSFT and the rest into WMT$.$