Calculate the coefficient of variation of stocks.

Calculate the coefficient of variation for the following three stocks. Then rank them by their level of total risk, from highest to lowest:

Conglomco has an average return of 11 percent and standard deviation of 24 percent.

Supercorp has an average return of 16 percent and standard deviation of 37 percent.

Megaorg has an average return of 10 percent and standard deviation of 29 percent.

provide formula used for the calculation