Question 1. A t-shirt printing company produces 120 t-shirts per day. On average, there are 280 t-shirts in the work-in- process inventory at the facility. What is the average flow time of the process? Show your work, explain, and include all the units (this problem is made simple intentionally to practice Littles Law. There is nothing tricky here). You must use the notation (i.e., letters defined for each) taught in class, or a zero grade will be assigned to this question.

Question 2. A library has a single reference desk that provides research assistance to students. On average, 10 students arrive per hour at the desk. The reference librarian can help 12 students in an hour. Due to variability in the arrivals, the average number of students waiting in line is 1.8 students. You must use the notation (i.e., letters defined for each) taught in class, or a zero grade will be assigned to this question. Compute the following (Hint: Littles Law works for any system/sub-system: for the whole system including line and server combined, for the line only, and for the server only): (a) The utilization of the reference desk (b) The average number of students in the system (c) The average time a student spends waiting in line (d) The average time a student spends in the system