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Problem 14.18 (additional/static) Question Help You need to schedule 10 units of product Alpha for delivery in 6 weeks. Three units of D and 2 units of F are required for each Alpha. The lead time for Alpha is 1 week. Lead time for D is 1 week, and lead time for F is 2 weeks. a) Complete the product structure. Alpha D(3) F(2) b) Choose the correct time-phased product structure below. O A. B. 0 . OD. O O O 6 1 2 3 4 5 Time in weeks 6 6 1 2 3 4 5 Time in weeks 1 2 3 4 5 Time in weeks 6 1 2 3 4 5 Time in weeks c) Prepare a gross requirements plan for Alpha (enter your responses as whole numbers). 1 2 3 4 5 6 Week Required Date Order Release Required Date Order Release Required Date Order Release OOOOOO