Suppose you have $$15,000$ to invest and you have purchased the following securities$.$

Stock A

Stock B

$ Amount

$$9,000$

$$6,000$

Mean return

$20\mathrm{.}45\%$

$10\mathrm{.}85\%$

Standard deviation $($sample$)$

$35\%$

$15\%$

Correlation coefficient

$-0\mathrm{.}85$

Calculate the following statistics: $(1/100$ of one percent without $\%$ sign, e$.$g$.12\mathrm{.}671,$ if a negative percentage, $-9\mathrm{.}56)$:

$1)$ Expected portfolio return: Answer

$2)$ Expected portfolio standard deviation: Answer