$6)$ Consider the following probability distribution on the expected return of two stocks.

State of Economy Return on X Return on Y Probability

Boom $30\%10\%0\mathrm{.}20$

Neutral $10\%20\%0\mathrm{.}50$

Poor $-30\%5\%0\mathrm{.}30$

g$)$ Find the expected return on each stock and make purchase recommendation.

h$)$ Find the standard deviation of return of two stocks and calculate the coefficient of variations. Which stock has lower risk per unit return?