A manager observes that on average, 5 students per minute enter the campus cafeteria. 10% of the students that enter the cafeteria see a long line and leave without entering the line. Given students are leaving before entering the process, the manager must determine the rate at which students are entering the process. On average, 18 students are waiting in line and we can assume that any student that enters the line will not leave.

1) I = _______

2) R = _______

3) On average how long does a student spend in the cafeteria line? Time measurement must be in minutes. Enter numbers only for answers and not text. ________