If np greater than or equals 5 and nq greater than or equals 5, estimate upper p (fewer than 4 )with nequals13 and pequals0.5 by using the normal distribution as an approximation to the binomial distribution; if npless than5 or nqless than5, 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.

a. p( fewer than 5 ) =
(round to four decimal places as needed.)
b. the normal approximation is not suitable.
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