Part A: (40 Marks) Given the following product tree (the quantities are shown between brackets in the next page): X A (1) B (2) C (3) C (1) The following data for X, A, B and C is as follows: Stock Safety Stock Lot Size Lead Time X 50 10 A 330 30 50 3 B 270 20 50 3 C 2000 25 100 3 The master production schedule calls for production of 40 X in period 1, 300 in period 5, 600 in period 6, 100 in period 7. There is a scheduled receipt of 1500 of C in week 3. 1. Calculate the MRP-explosion and write the steps of calculation (20 Marks) 2. Discuss the limitations of MRP system. (20 Marks)