Problem 108 An aluminum rod is rigidly attached between a steel rod and a bronze rod as shown in Fig. P-108. Axial loads are applied at the positions indicated. Find the maximum value of P that will not exceed a stress in steel of 140 MPa, in aluminum of 90 MPa, or in bronze of 100 MPa. Figure P-108 Steel A-500 m Aluminum A-400 mm² Bronze A-200 mm² 2.5m 2.0m 1.5m