2. Bob Stahl, the distribution manager at Forbes Industries, is considering using error addback for his DRP system. To evaluate its use, he compiled data for three periods on a sample product, the Scarlet Tiara. The initial DRP record is given here: Chapter 14) Week 1 2 3 4 5 Forecast Requirements 30 30 30 30 30 In Transit 60 Projected Available Balance 10 40 10 40 10 40 Planned Shipments 60 60 Q = 60, LT = 1, ss = 10 a. Develop the DRP records above for periods two through four given demands of 5+X, 7+X, and 8+X in periods one, two, and three. b. Complete the same records using the error addback method. What differences occur? X=35