*ANSWER PART B FOR ME PLEASE

As the production planner for Xiangling Hu Products, Inc., you have been given a bill of material for a bracket that is made up of a base, 2 springs, and 4 clamps. The base is assembled from 1 clamp and 2 housings. Each clamp has 1 handle and 1 casting. Each housing has 2 bearings and 1 shaft. There is no inventory on hand. Click the icon to view the product structure. Your boss at Xiangling Hu Products, Inc., has just provided you with the schedule and lead times for the bracket. The unit is to be prepared in week 12. The lead times for the components are bracket (1 week), base (1 week), spring (1 week), clamp (1 week), housing (3 weeks), handle (2 weeks), casting (4 weeks), bearing (1 week), and shaft (1 week). a) Choose the correct time-phased product structure for the bracket OA B. OC. OD. a handle handle handle handle dlamp clamp base Clamp base casting casting bearing bearing bracket bracket clamp casting base bearting bracket housing shaft sorting handle clamp housing housing spring soting shaft shaft handle casting base bearing bracket housing shaft spring handle clamp casting 5 6 7 8 9 10 11 12 Time in weeks handle clamp clamp casting casting 5 6 7 8 9 10 11 12 Time in weeks casting 5 6 7 8 9 10 11 12 Time in weeks 5 6 7 8 9 10 11 12 Time in weeks b) In what week do you need to start the castings? The castings need to be started in week (enter your response as a whole number). ( More Info The product structure. LT = Lead time in weeks Bracket LT=1 Base (1) Spring (2) LT=1 LT=1 Clamp (1) LT=1 Housing (2) LT=3 Clamp (4) LT=1 Handle (1) Casting (1) Bearing(2) Shaft(1) Handle (1) Casting(1) LT=2 LT=4 LT=1 LT=1 LT=2 LT= 4