If np≥5 and nq≥​5, estimate P(at least 5) with n=13 and p=0.4 by using the normal distribution as an approximation to the binomial​ distribution; if np

If

and

estimate

with

and

by using the normal distribution as an approximation to the binomial​ distribution; if

or

then state that the normal approximation is not suitable.

Select the correct choice below​ and, if​ necessary, fill in the answer box to complete your choice.