The following table gives the probability distribution of a discrete random variable x.
x 0 1 2 3 4 5 6
P(x) .11 .19 .28 .15 .12 .09 .06
Find the following probabilities.
a) P(1≤x≤4)
b) Probability that x assumes a value less than 4.
c) Probability that x assumes a value greater than 2.