Perth Industries is studying an asset. The probability distribution of returns for this asset is shown in the following​

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Perth Industries is studying an asset. The probability
distribution of returns for this asset is shown in the
following​ table,
1 0.10 20.00
2 0.25 15.00
3 0.40 5.00
4 0.05 0.00
5 0.20 -5.00
.
a.  Calculate the expected value of​ return,r​,
for the asset.
b. Calculate the standard​ deviation,σr​,for
the​ asset's returns.
c. Calculate the coefficient of​ variation,
CV​,
for the​ asset's returns.