detailed explanations, please!

Problem 13-17 Using the SML (LO4] Asset W has an expected return of 12.8 percent and a beta of 1.25. If the risk-free rate is 4.7 percent, complete the following table for portfolios of Asset W and a risk-free asset. (Leave no cells blank - be certain to enter "O" wherever required. Do not round intermediate calculations. Enter your expected returns as a percent rounded to 2 decimal places, e.g., 32.16, and your beta answers to 3 decimal places, e.g., 32.161.) Portfolio Beta Percentage of Portfolio in Asset W 0 % 25 50 Portfolio Expected Return 4.70% 2.70% 4.09% 6.12% 8.15% 10.17% 12.201% 75 100 125 150 If you plot the relationship between portfolio expected return and portfolio beta, what is the slope of the line that results? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Slope of the line 6.48%