dicksin sports equipment is a mythical manufacturer of a variety of sport goods. The bill of materials for one of its popular products, a sidewalk skateboard us made up of fiberglass board and two wheel assemblies. Each wheel assembly requires two wheels, one spindle, one wheel mount stand and two lockouts. given this information; a) Draw a product structure tree using low-level coding and indicate the quantities for each component b) Determine the gross requirements for each subassembly and components to assemble 60 sidewalk skateboards c) If 60 sidewalk skateboards are to be assembled, compute the net requirements if there are 10 fiberglass boards, 20 wheel assemblies and 15 spindles in stock