The completed rotor component involves the production of the body, as described in problem 5, with the addition of a centered 12.5 cm diameter hole, surrounded by twelve 1.5 cm diameter holes as shown in Fig. 9.43. (a) Estimate the press force required to punch these 13 holes simultaneously, and select an appropriate press from Table 9.4. (b) Estimate the cost of the required die. (c) Estimate the cycle time and process cost for this piercing operation. Figure 9.43