Three steel plates are joined together using two rivets that have a diameter of 16 mm. The plates have a width L of 8.0 cm. The central plate has a thickness of 2.0 cm and the other two plates have a thickness of 1.0 cm. For plates, the permissible stresses are: shear 160 MPa, compression 170 MPa, tension 190 MPa. For bolts, the permissible stresses are: shear 140 MPa, compression 650 MPa, tension 620 MPa P/2 |2 cm P P/2 P/2 7814 P L (a) For the plate, what is the maximum value of P allowed (P is the force exerted on the system) (b) For bolts, what is the maximum P value allowed?