a) Using Johnson's rule for 2-machines scheduling, the job sequence is as follows: Scheduled Order Job A Machine Tools company that manufactures a small gear box for Caterpillar has received the following set of seven jobs that needs to be processed through two machines at their manufacturing facility. The sequence is to first design them using the CAD system, then produce in the second machine. Processing time at each of the machines is shown below. 1 2 V 3 V Job A Machine-1 (hours) Machine-2 (hours) 12 4 8 11 5 14 4 7 5 7 6 2 10 6 9 3 1 7 7 13 b) For the schedule developed using Johnson's rule, the total length of time taken to complete seven jobs = hours (enter your response as a whole number)