A school cafeteria is operated by 5 personnel each performing one of the following activities with the average times shown below: Activity Time (Seconds) A. serve salad 10 B. serve vegetables 20 C. serve entree 60 D. serve drinks 30 E. collect payment (last activity) 40 To receive credit for this question, you need to upload your hand-written calculations using the "Upload your Exam Calculations" link provided in the Assignments section of Canvas. You will have up to 30 minutes after the conclusion of the exam to make this submission. Q17) System cycle time is: 90 seconds 20 seconds 60 seconds O 160 seconds O 10 seconds