Roenfeld Corp believes the following probability distribution exists for its stock. What is the coefficient of variation on the company's stock? (Hint: this requires the calculation of TWO measures that are used in calculating the coefficient of variation) do it in excle with formula.

State of the Economy	Probability of State Occurring	Stock's expected Return
Boom	0.25	40%
Normal	0.25	30%
Recession	0.5	-5%