Please help with answering 3 and 4. Not sure how to calculate it.

1) How long, on average, does it take to complete the entire process for a group portrait? (Enter your response as an integer.) minutes. 2) What single activity is the bottleneck for the entire process, assuming the process receives equal amounts of both groups and individuals? 3) What is the capacity of the bottleneck per hour for individuals? (Enter your responses as integers.) customers per hour 4) What is the capacity of the bottleneck per hour for groups? (Enter your responses as integers.) groups per hour