You are given the following probability distribution of returns for stock J: probability of .2 that the return will be 12%; a probability of .35 that the return will be 18% a probability of .3 that the return will be -10%: and a probability o15 that the return will be 10^. What is the expected return of this stock? What is the standard deviation rounded to the nearest whole number? Given the following hypothetical returns of large companies and T-bill between 2007 and 2012. Please calculate the average return and standard deviation of both large companies Troy has a 2-stock portfolio with a total value of S 100.000. $37, 500 is invested in Stock A with a beta of 0.75 and the remainder is invested ill Stock B with a beta of 1.42. What is his portfolio's beta