An insurance company offers its policyholders a number of different premium payment options. for a randomly selected policyholder, let x = the number of months between successive payments. the cdf of x is as follows: f(x) =0 - x < 10.33 - 1 < x < 30.44 - 3 < x < 40.48 - 4 < x < 60.86 - 6 < x < 121 - 12 < xa. what is the pmf of x? x 1 3 4 6 12p(x)b. using just the cdf, compute p(3 ≤ x ≤ 6) and p(4 ≤ x).p(3 < x < 6) =p(4 < x) =