A restaurant receives on average 1,200 customers per day (between 10 a.m. and 10 p.m.). During peak times (12 p.m. to 3 p.m. and 6 p.m. to 9 p.m.), the restaurant receives around 900 customers in total and, on average, 90 customers can be found in the restaurant at a given point in time. At non-peak times, the restaurant receives 300 customers in total and, on average, 30 customers can be found in the restaurant at a given point in time. 

• What is the average time that a customer spends in the restaurant during peak times? 

• What is the average time that a customer spends in the restaurant during non-peak times? 

• The restaurant’s premises have a maximum capacity of 110 customers. This maximum capacity is sometimes reached during peak times. The restaurant manager expects that the number of customers during peak times will increase slightly in the coming months. What can the restaurant do to address this issue without investing in extending its building?