You are going to open an ice cream shop!!! You think your returns are going to depend on the weather... If it is hotter you will have better sales and make more money. What you forecast for the weather and your sales is below...

Hot: probability: $0\mathrm{.}5$ Return $($as $\%)$: $16$

Warm probability: $0\mathrm{.}2$ Return $($as $\%)$: $8\mathrm{.}5$

Cold probability: $0\mathrm{.}3$ Return $($as $\%)$: $-4$

Based on the table, what is your expected return???

Referencing the above, what is the variance of your returns?

Referencing the above, what is the standard deviation of your returns?