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 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 (3 weeks), bearing (1 week), and shaft (1 week). a) Choose the correct time-phased product structure for the bracket