Use Table 1 in Appendix I to find the following:
a. P(x < 12) for n = 20, p = .5
b. P(x ≤ 6) for n = 15, p = .4
c. P(x > 4) for n = 10, p = .4
d. P(x ≥ 6) for n = 15, p = .6
e. P(3 < x < 7) for n = 10, p = .5