3. Two 3/8 x 6-in. plates are joined by 3/4-in.-diameter rivets as shown. Determine the maximum allowable load P on the plates if the allowable stress in tension is 22 ksi, the allowable stress in shear is 29 ksi, and the allowable stress in bearing is 58 ksi. 11/2 in. 3 in. P 6 in. P 1 1/2 in. 3/8 in. 3/4-in.-diameter rivets -P