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3.1. Consider 1 || Lw,Cj with the following weights and processing times job3 45 ' wj 0 18 12 8 8 17 16 pj 3 6 6 5 4 8 9 (a) Find all optimal sequences. (b) Determine the effect of a change in p2 from 6 to 7 on the optimal sequence(s). (c) Determine the effect of the change under (b) on the value of the objec- tive.