QUESTION 5 3points Determine which of the following is a valid discrete probability distribution x 0 1 2 3 P(X=x) 0.21 0.66 0.09 0.03 x -5 3 5 6 P(X=x) 0.27 -0.21 0.73 0.21 x 0 1 2 3 P(X=x) 0.2 1 .02 0.05 0.32 x 0 1 2 3 P(X=x) 0.67 0.16 0.14 0.03