Which of the following statements is true regarding customers in a queuing system with multiple lines and multiple servers compared to a queuing system with a single line and multiple servers (i.e. a 'serpentine' line), assuming similar arrival and service rates?

In a multiple line multiple server system, the average waiting time for customers is generally longer than in a serpentine system.

In a serpentine system, the line is generally longer, but it moves quicker.

Examples of companies using a multiple lines and multiple servers system include supermarkets and department stores.

Examples of companies using a serpentine system include banks and post offices.

All of the above are true