(a) Find the optimal load size from the following cases for two machines if the processing time is 1 time unit per piece and material handling time is 3 time unit per move. Use Excel to solve the problem and draw the chart for Completion time Vs Unit load size (1) Unit load size is 12 pieces and number of transfers is 1 (2) Unit load size is 6 pieces and number of transfers is 2 (3) Unit load size is 4 pieces and number of transfers is 3 (4) Unit load size is 3 pieces and number of transfers is 4 (5) Unit load size is 2 pieces and number of transfers is 6 (6) Unit load size is 1 pieces and number of transfers is 12 (b) What is the effect of unit load size on job completion times