Rigid bar abc is supported by pin-connected axial member (1) and by a 0.85-in.-diameter double shear pin connection at c. member (1) is a 3.00 in. wide by 0.75 in. thick rectangular bar made of aluminum with an elastic modulus of 9100 ksi. when a concentrated load p is applied to the rigid bar at a, the normal strain in member (1) is measured as -840 με. assume a=26 in., b=33 in., c=12 in., and d=33 in.(a) determine the magnitude of the applied load p.(b) determine the average shear stress in the pin at c.