T, 1,, I . The returns of Railroad United ( Major Application of Technology (MAT). Econom return of 14% for RIU and -9% for MAT. Economy 2 (with probability .15) gives a return of 16% for RIU and 11% for MAT. Economy 3 (with probability .30) gives a return of 22% for RIU and 15% for MAT. Economy 4 (with probability .30) gives a return of 7% for RIU and 5% for MAT. Economy 5 (with probability .10) gives are return of -2% for RIU and 10% for MAT. What is the expected return and standard deviation on a portfolio that is 50% RIU and 50% MAT? RIU) are listed below, along with the returns on y 1 (with probability .15) gives a