A Farmer Has a Choice of Growing Wheat, Barley, or Rice

A farmer has a choice of growing wheat, barley, or rice. Her success will depend on the weather, which could be dry, average, or wet. Her payoff matrix is as follows. $\begin{array}{l}&\text { Weather }\\\begin{array} { l } \text {Crop }\\ \text { Choices}\\\end{array}&\begin{array}{|l|c|c|c|}\hline & \text { Dry } & \text { Average } & \text { Wet } \\\hline \text { Wheat } & 20 & 15 & 10 \\\hline \text { Barley } & 20 & 15 & 20 \\\hline \text { Rice } & 20 & 15 & 15 \\\hline\end{array}\end{array}$
If the probability that the weather will be dry is 20%, the probability that it will be average is 60%, and the probability that it will be wet is 20%, what is the farmer's best choice of crop