A Problem 4 (15%) Taes Coffee is evaluating its production system by assessing its effectiveness. For the production system, Taes Coffee produces and processes its own coffee beans which is separate from its cafe business. The coffee beans themselves consist of Arabica, Robusta, and Excelsa coffees. The production activities are presented in the following table. Assembly Time Precedence Task Code Task Description (Minutes) Activity Receiving coffee beans 3 B Sorting of coffee beans Sifting Robusta beans D Drying Excelsa beans E Roasting Arabica beans 5 F Grinding coffee beans C, D, E G Cooling of Arabica beans H Storing of Robusta dan Excelsa beans I Storing of Arabica beans Total Task Time 5 A 7.5 B 5 B B 7 4 F 3 F 3 G 42.5 Taes Coffee operates for 7 days from Monday to Sunday with a production target of 50 bags of coffee per day. Every day it operates from 10 AM to 10 PM. a) Draw the precedence diagram of Taes Coffee production activities! b) Calculate the cycle time of this cafe in order to meet the demand for coffee per day! c) Calculate Taes Coffee's theoretical minimum number of workstations and compare it to the actual workstations! d) Calculate the efficiency of the series of Taes Coffee production activities