A school cafeteria is operated by five persons performing the activities in the average times shown in the followingchart.Activity$1.$ Serve salad and dessert$2.$ Pour drinks$3.$ Serve entr$$e$4.$ Serve vegetables$5.$ Tally and collect paymenta. What are the bottleneck activity and the maximum service capacity per hour? b$.$ Suggest a reallocation of activities that would increase capacity and use only four employees, and draw aproduct flow diagram. What is the capacity of your improved system? c$.$ Recommend a way to maintain the serving capacity found in part b using only three employees.