ABC Fast Food has four activities in serving a customer: greet customer, take order, process order, and deliver order. Each activity is staffed by one employee $($for a total of four employees$).$ The processing time for each activity is given as follows:

Activity

Processing time per customer

Greet customer

$2$ seconds

Take order

$30$ seconds

Process order

$60$ seconds

Deliver order

$5$ seconds

What is the capacity of this process?

Multiple Choice

$1$customer per minute

$30$ customers per minute

$2$ customers per minute

Can not be determined from the information provided.

$12$ customers per minute