3. Power Tools (PT) has just received an order for 70 PT band saws, to be shipped at the beginning of week 9. Information concerning the saw assembly is given here:

PT Band Saw Item Lead Time (weeks) Components Saw 2 A(2*), B, C(3)

A 1 E(3), D B 2 D(2), F(3)

C 2 E(2), D(2)

D 1 E 1 F 3

*Number of parts required to make one parent.

a. Draw the product structure tree.

b. Construct a Gantt chart for the new order using front schedule logic.

c. Construct a Gantt chart for the new order using back schedule logic.