Expected Rate of Return and Risk

The following table shows the annual returns over time for two stocks.

Probability A B

$0\mathrm{.}103\%10\%$

$0\mathrm{.}2021$

$0\mathrm{.}4078$

$0\mathrm{.}201216$

$0\mathrm{.}101724$

Calculate each stock$$s expected return, standard deviation, and coefficient of variation.