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(a) As the production planner for Xlangling Hu Products, Inc., you have been given a bill of material for a bracket that is made up of a base, two springs, and four clamps. The base is assembled from one clamp and two housings. Each clamp has one handle and one casting. Each housing has two bearings and one shaft. There is no inventory on hand. [4 marks] i) Design a product structure noting the quantities for each item and show the low-level coding. ii) Determine the gross quantities needed of each item if you are to assemble 60 brackets. (b) Sue Helms Appliances wants to establish an assembly line to manufacture its new product, the Micro Popcorn Popper. The goal is to produce five poppers per hour. The tasks, task times, and immediate predecessors for producing one Micro Popcorn Popper are as follows: [6 marks] ii) Determine the gross quantities needed of each item if you are to assemble 60 brackets. (b) Sue Helms Appliances wants to establish an assembly line to manufacture its new product, the Micro Popcorn Popper. The goal is to produce five poppers per hour. The tasks, task times, and immediate predecessors for producing one Micro Popcorn Popper are as follows: [6 marks] i) What is the theoretical minimum for the smallest number of workstations that Helms can achieve in this assembly line? ii) Graph the assembly line and assign workers to workstations. Can you assign them to the theoretical minimum? iii) What is the efficiency of your assignment