Question 1 (1 point) A stock's returns have the following distribution: Probability Rate of Return 0.1 -38% 0.2 -10% 0.4 10% 0.2 20% 0.1 30% Calculate the stock's a) expected return, b) standard deviation, and c) coefficient of variation. a)5.20%; b)18.64%; c)3.58 a)5.20%; b)3.47%; c)0.67 a)2.40%; b)18.64%; c)3.58 a)2.40%; b)18.85%; c)7.85