Check my work 3 Treasury bills Stock P Stock 2 Stock R Return (%) 4.5 8.0 17.0 21.5 Standard Deviation (%) 0 14 34 26 10 points Calculate the standard deviations of the following portfolios. eBook a. 50% in Treasury bills, 50% in stock P. (Enter your answer as a percent rounded to 2 decimal places.) Print References Standard deviation 7.00 % b. 50% each in Q and R, assuming the shares have: (Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places.) Perfect positive correlation Perfect negative correlation No correlation Standard Deviation 30.00% % %