The meshing forces shown in the figure act in planes parallel to the yz plane. The force on gear A is $400lbf,Fc$ is $300lbf.$ Fs of $2\mathrm{.}4.$ The shaft must be made of AISI $1030$ cold rolled medium carbon steel.

Determine the magnitudes of the bearing reaction forces

Construct the bending moment diagram for the shaft and determine the maximum bending moment

I