If you could please explain how to solve these on a finance caluclator like the HP 10B11+, I see the answer but I need to know how to get it lol

Tour broker has developed a list of firms, their betas, and the return he expects the tock to yield over the next twelve months (labeled "Expected Return"). You have stimated that the risk-free rate is 5% and the return to the market will be 12%. ssuming that CAPM is correct, which stock should you purchase? Firm Beta Expected Return Anderson, Inc. 0.75 10.5% Delta Vanlines 1.24 13.0% Nathan's 1.60 16.0% Bakeries Z-man 2.15 19.0% Electronics All of the stocks Anderson, Inc. Z-man Electronics Delta Vanlines Nathan's Bakeries QuCJIUNIO You decide to form a portfolio of the following amounts invested in the following stocks. What is the beta of the portfolio? Stock Apple Microsoft Ford Amount Beta $8,000 2.40 $6,000 0.73 $4,000 1.95 $2,000 1.27 Expected Return 10.50% 16.90% 15.75% 11.80% Time Warner 159 1.59 1.43 1.70 1.88 01.05