6) Given the following product tree (the quantities are shown between brackets in the next page): known: A 1(1) 81 (1) 10 Subassembly x1 82 (1) E(1) C(2) D(1) The following data is Stock Safety Stock Lead Time x1 60 10 20 2 20 2 AL 30 5 c 50 1 D 200 2 Gross requirements for X1 is as follows: Period 1 Gross Requirement 2 3 S 6 7 " 20 20 100 Calculate the MRP explosion and write the steps of calculation 11