47. Repeat parts (a)–(c) of Exercise 46 for independent tasks of lengths 19, 19, 20, 20, 1, 1, 2, 2, 3, 3, 5, 5, 11, 11, 17, 17, 18, 18, 17, 2, 16, 16, 2.
47.
(a) Machine 1: 129; Machine 2: 129
(b) Machine 1: 123; Machine 2: 123
(c) Yes