Suppose your expectations regarding the stock market are as follows:

$E(r)={\displaystyle \underset{s=1}{\overset{s}{}}}p(s)r(s)$

Var$(r)-={}^2={\displaystyle \underset{s=1}{\overset{s}{}}}p(s)[r(s)-E(r){]}^2$

$SD(r)-==\sqrt[\phantom{2}]{\text{V}\text{a}\text{r}(r)}$

Required:

Use above equations to compute the mean and standard deviation of the HPR on stocks. $($Do not round intermediate calculations.

Round your answers to $2$ decimal places.$)$

Answer is complete but not entirely correct.