Let X and Y be two discrete random variables with joint probability mass function (pmf) described by the following table: X 0 1 2 0 0.1 0.4 0.1 0.2 0.2 0 (a) Are the random variables X and Y independent? (b) Are the random variables X and Y uncorrelated? (c) Are the random variables \\ and ) orthogonal? (d) What is the correlation coefficient between X and Y