Please explain steps for C

An MRP exercise is being implemented over an 8-week period and the following relevant information is provided: One (1) unit of A is made of two (2) units of B, two (2) unit of C, and two (2) units of D. B is composed of two (2) units of E and one (1) unit of D. C is made of two (2) units of B and three (3) units of E. E is made of two (2) units of F.

Items B, C, and E have one (1) week lead times; A and F have lead times of two (2) weeks; D has lead time of three( 3) weeks.

Assume that lot-for-lot (L4L) lot sizing is used for Items A, B and F; lots of size fifty (50), fifty (50) and one hundred (100) are used for Items C, D and E respectively. Items C, E and F have on-hand (beginning) inventories of twenty (20),fifty (50) and fifty(50), respectively; all other items have zero beginning inventory. We are scheduled to receive ten (10) units of A in Week two (2), fifty (50) units of E in Week one (1), and also one hundred (100) units of F in Week one ( 1). There are no other scheduled receipts.

a) Draw the product structure tree with low level coding [5 marks]

b) Draw the corresponding time-phased diagram showing lead times to scale. [5 marks]

c) If forty (40) units of A are required in Week eight (8), determine the necessary planned order releases for all components {6 schedules} [15 mark