Q6. Scheduling (11 marks] distribution center uses a two-step process to fill orders. Each order must be processed hrough step 1 and step 2. in that order. Seven orders to be processed are shown below in inutes). Job Time in Step 1 Time in Step 2 A 8 12 6 13 19 7 20 15 MO10 22 18 17 16 13 15 1. 3 marks) Determine the sequence in which the orders should be processed so that the makespan can be minimized. 2. 15 marks] Construct a chart showing the sequence of the orders in each step. What is the optimal makespan, and what is the total idle time in the two steps? 3. 3 marks] An error has been found for the estimated time of conducting step 2 of order C. After the error has been corrected, the optimal job sequence determined above is not affected. What is the range of values for the time in step 2 of order C