A firm that produces wood shutters and bookcase has received two orders for shutters: one for 100 shutters and one for 150 shutters. The 100-unit order is due at the start of week 4 of the current schedule, and the 150-unit order is due for delivery at the start of week 8. Each shutter consists of 4 slatted wood sections and two frames. The wood sections are made by the firm, and fabrication takes one week. The frames are ordered, and lead time is two weeks. Assembly for the shutters requires one week. There is a schedule receipt of 70 wood sections in (ie: at the beginning of) week 1. Determine the size and timing of planned-order releases necessary to meet delivery requirements under each of these conditions. (a) (b) Lot-for-lot (ie: order size equal to net requirements) ordering for wood shutters and bookcase. Lot-size ordering with a multiple lot size of 320 units for frames and 70 units for wood sections. Given the information above, you are required to: Develop a product structure tree for the shutters (b) Perform MRP calculations for the product.