The expected return on Big Time Toys is 9% and its standard deviation is 21%. The expected return on Chemical Industries is 13% and its standard deviation is 26.5%. a. Suppose the correlation coefficient for the two stocks' returns is 0.25. What are the expected return and standard deviation of a portfolio with 44% invested in Big Time Toys and the rest in Chemical Industries? (Round your answers to 2 decimal places.) Portfolio's expected return Portfolio's standard deviation b. If the correlation coefficient is 0.75, recalculate the portfolio expected return and standard deviation, assuming the portfolio weights are unchanged. (Round your answers to 2 decimal places.) Portfolio's expected return Portfolio's standard deviation c. Why is there a slight difference between the results, when the correlation coefficient was 0.25 and when it was 0.75? (Click to select)