A machine shop has two machines, A and B. Five jobs need each to be processed through machine A first and B second. Job 1 will take one hour on machine A and three hours on machine B. Job 2 will take seven hours on A and five hours on B. Job 3, five on A and four on B. Job 4, 6 hours on A and three hours on B. Job 5, two hours on A and four hours on B.Using Johnson's rule, in what order should these jobs be done? A 1 Job 1 Job 2 Job 3 Job 4 Job 5 7 5 6 2 B 3 5 4 3 4 1-4-2-5-3 5-2-4-3-1 1-2-3-4-5 1-5-2-3-4 1-5-4-3-2 All sequences are equal and hence there is no preffered scheduling sequence