betra? Fort-ks: 2. Tle asmalreburs for Claskints ine and for Aetra are Mow wi the tat be: Betrat portotud 2. The annual returns for GlaxoSmithkline and for Aetna are show in the table. What is the average return and standard deviation of returns for these two firms? What is the average return and risk of a portfolio consisting of 75 percent of GlaxoSmithKline and 25 percent Aetna? 3. You have gathered average return and standard deviation data for five stocks (A-E). How have these stocks performed on a risk-versus-return basis? Which one has the best risk-to-reward trade-off? Show your calculations for all five stocks