Fig. P$3\mathrm{.}126$

$3\mathrm{.}126$ A mechanic uses a crowfoot wrench to loosen a bolt at $C.$ The

mechanic holds the socket wrench handle at points A and $B$ and

applies forces at these points. Knowing that these forces are equiva$-$

lent to a force$-$couple system at $C$ consisting of the force $C=$

$-(8lb)i+(4lb)k$ and the couple $M_C=(360lb*in.)i,$ determine the

forces applied at A and at $B$ when $A_z=2lb.$