Points A and $B$ of the solid cast$-$iron bracket experience forces, as indicated in

Figure $($a$).$ The cross$-$section of the bracket as seen from the $z-$axis is seen in Figure

$($b$).$ Determine the state of stresses and sketch the stress elements using the

bracket's $20mm$ diameter as a starting point:

i$.$ At point $H,$

ii$.$ At point $K,$

iii. state of stresses at point $L$ without using any calculation.