A customer wants to estimate the average delivery time of a pizza from the local pizza parlor. The customer wants to obtain a sample mean that falls within 3.914 minutes of the true average delivery time with 99% confidence. If the customer knows the standard deviation of the delivery times of all pizzas is 13.462, how many pizzas will need to be ordered?

Question 6 options:

1)78

2)84

3)89

4)We do not have enough information to answer this question since we were not given the sample mean.

5)79