6-25* A lever is loaded and supported as shown in Fig. P6-25. Determine (a) The reactions at A and C. (b) The normal stress in the 2-in.-diameter rod CD. (c) The shearing stress in the 2-in.-diameter pin at 4. which is in double shear. (d) The change in length of rod CD, which is made of a material with a modulus of elasticity of 30(10) psi. y 40 lb 60 lb 80 lb 4 in. 4 in. 4 in.- A B 6 in. 6 in. 125 lb D Figure P6-25 6-26 The wood plane shown in Fig. P6-26 moves with a constant velocity when subiected to the forces shown