20. The investor is presented with the two following stocks: Expected Return Standard Deviation Stock A 30% 50% Stock B 40% 60% Assume that the correlation coefficient between the stocks is -1. What is the standard deviation of the return on the portfolio that invests 30% in stock A? A.30.00% B.24.35% C.27.00% D.34.24% 14. What's the average monthly return on Walmart stock from 7/1/2015 to 12/1/2015 Date End of Day Price Dividend in this month Holding Period Monthly Return 7/1/15 71.98 0 8/1/15 64.73 0.49 -10.07% 9/1/15 64.84 0 0.93% 10/1/15 57.24 0 -11.72% 11/1/15 58.84 0 2.80% 12/1/15 61.30 0.49 4.18% A.-2.78% B. 2.45% C. -1.67%