stock a has a beta of 1.2, stock b's beta is 1.46, and stock c's beta is .72. if you invest $2,000 in stock a, $3,000 in stock b, and $5,000 in stock c, what will be the beta of your portfolio? a) 1.008 b) 1.014 c) 1.038 d) 1.067 e) 1.127 group of answer choices