A horizontal aluminum rod 4.8 cm in diameter projects 5.3 cm from a wall

A horizontal aluminum rod 4.8 cm in diameter projects 5.3 cm from a wall. A 1200 kg object is suspended from the end of the rod. The shear modulus of aluminum is 3.0×1010N/m². Neglecting the rod’s mass, find

(a) the shear stress on the rod and
(b) the vertical deflection of the end of the rod.