Question 2 Two Random Variables and Correlation 1. Let X be a random variable, and E[X]=1,E[X2]=3,E[XY]=4,E[Y]=2. Find Cov(X,2X+Y) 2. Let X,Y be two random variables. E[X]=0.14,E[Y]=0.2,x=0.03, y=0.06. Define random variable Z=0.3X+0.7Y. a. Find E[Z]. b. Find z when xy=1,0,1, respectively. Question 2 Two Random Variables and Correlation 1. Let X be a random variable, and E[X]=1,E[X2]=3,E[XY]=4,E[Y]=2. Find Cov(X,2X+Y) 2. Let X,Y be two random variables. E[X]=0.14,E[Y]=0.2,x=0.03, y=0.06. Define random variable Z=0.3X+0.7Y. a. Find E[Z]. b. Find z when xy=1,0,1, respectively