$6-2.$ The drill is jammed in the wall and is subjected to both a torque and a force from the hand holding it$.$ The torque is $20$ N$.$m and force magnitude and direction are show below. $($a$)$ Determine the state of stress at both points A and $B$ on the cross section of drill bit at section $a-a.($b$)$ plot the stresses on the stress elements located at these points.