PLEASE HELP ASAP: A cantilever beam with $1$ inch diameter round cross$-$section is loaded at the free end with a transverse force of $1000$ lbf in $+z$ direction, a torque of $5000$ lbf $-$in at the free end and a continuous load of $100$ lbf per inch $3$ inches from both ends in the $-y$ direction. $(80$ points$)$ SHOW YOUR WORK

a$)$ Calculate bending moments $M_y$ and $M_z$ and the maximum bending moment at the fixed wall cross$-$section.

b$)$ Calculate the maximum bending stress at that section