John is a front$-$line manager in a restaurant; he is concerned that there is an insufficient number of control mechanisms in the restaurant. Which of the following could happen if there is there is as insufficient number of control isystems in the restaurant?

The servers will get less tips.

There could be too few staff at the restaurant.

The staff may not work well as a team.

The number of customers would be different on different days of the week.

The cost of hiring could increase.