i just need the formulas for whats blank please (portfolio E(R)) & the slope of SML

Asset W has an expected return of 8.8 percent and a beta of.90. If the risk-free rate is 2.6 percent, complete the following table for portfolios of Asset Wand a risk-free asset. What is the slope of the line that results? Input area: Stock E(R) Stock beta Risk-free return 8.80% 0.90 2.60% (Use cells A6 to B8 from the given information to complete this question.) Output area: Portfolio E(R) Weight of w 0% 25% 50% 75% 100% 125% 150% Slope of SML Weight of risk-free 100% 75% 50% 25% 0% -2596 -50% Portfolio beta 0.000 0.225 0.450 0.675 0.900 1.125 1.350