2. The time-phased net requirements for the base assembly in a table lamp over the next six weeks are: Week 1 2 3 4 5 6 Requirements 335 240 180 320 320 200 Capacity 400 200 500 300 300 300 The setup cost for the construction of the base assembly is $200, and the holding cost is $0.30 per assembly per week. a. Determine lot sizing do you obtain with the capacity constrain. b. Determine the lot sizes using back-shifting