1) Suppose a random variable X can only take the six values (1, 2, 3, 4, 5, and 6). If each value has equal probability, what is its pmf? 2) Show that f(x) is a pmf- x if x 1,2,3, and f(x)=10 and 4} 0 otherwise 3) Suppose the probabilities of X (0,1,2, and 3) are 1/9, 2/9, 2/9, and 4/9. show its pmf?