7. 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(1x4)

b) Probability that x assumes a value less than 4.

c) Probability that x assumes a value greater than 2.