you have $80,000 to invest. you decided to have 3 stocks in portfolio. already have 2. Gap with beta1.31 and Disney beta 1.25. you have $20,000 in each.. for final stock looking at Ford 2.72 beta, eBay 1.75 beta, IBM .68 beta & Annheiser 1.00 beta. you wantoverall portfolio beta to be close to market or a average stock as possible. make a 3rd selection. calculate beta of all 3 stocks in portfolio. formual and answe please