Production of product A follows the schematic shown in figure below. P, the probability of generating a defective unit in stage i, is given in the accompanying table. a- Determine the number of units that must be started in stage 1 to obtain 100 good units of product A. b- Determine the average cost of a good unit of product A. 3 Stage 1 P C 4 0.2 2 0.4 3 0.4 4 0.6 8 5 0.2 2 6 0.5 4 6 2 3 5