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, 1 spring, and 4 clamps. The base is assembled from 2 clamps and 1 housing. Each clamp has 1 handle and 2 castings. Each housing has 2 bearings and 1 shaft. There is no inventory on hand. a) Design a product structure noting the quantities for each item and show the low-level coding. Match each number in the structure below with the corresponding item. Number Item | Spring(1) || Housing (1) ||| Casting (2) IV Shaft (1) Clamp (2) Bracket Base I (1) II Clamp (4) Handle(1) III Bearing (2) IV Handle(1) Casting (2) b) Determine the gross quantities needed of each item if you are to assemble 50 brackets. Click the icon to view the completed product structure. Base: Spring: Clamp: Housing: Handle: Casting: Bearing: Shaft: 50 units (enter your response as a whole number). 50 units (enter your response as a whole number). units (enter your response as a whole number). units (enter your response as a whole number). units (enter your response as a whole number). units (enter your response as a whole number). units (enter your response as a whole number). units (enter your response as a whole number).