You invested 50% of the wealth in stock A and the remaining 50% in stock B. The expected rates of returns on A and B are given below: Year Expected return on A Expected return on B 2000 14% 16% 2001 15% 17% 2002 16% 18%2003 17% 19%Find the standard deviation of the portfolio. A. 0.955%.B. 1.291%.C. 1.697%.D. 2.124%.E. 2.890%.