Use the test 3 to determine whether the following binomial distributions can be approximated by

Use the test µ ± 3σ to determine whether the following binomial distributions can be approximated by using the normal distribution.
a. n = 8 and p = .50
b. n = 18 and p = .80
c. n = 12 and p = .30
d. n = 30 and p = .75
e. n = 14 and p = .50