A university service center hires part-time student workers and opens 10:00am-4:00pm daily. The number of student workers required hour-by-hour is given in the table. Student workers are scheduled for 3-hour shifts and work for 3 consecutive hours once they report on duty. Use LP to find the staff scheduling plan with the minimum total number of student workers hired. Hint: There are only 4 possible shifts to assign student workers to, i.e., starting at 10:00am, 11:00am, noon, and 1:00pm