Question $4[8$ marks$]$ Flexure formula problem

For the l$-$section simply supported beam given below. Find the

$1.$Absolute Maximum bending stress

$2.$ Bending Stress at point B

Drawing: $3$ marks; Step wise solving: $2$ marks; Correct Moment of Inertia and Neutral axis location: $2$ marks; Results accuracy: $1$ mark.