$($a$)$ The flexural stress at point $A$ on section A$-$A through the beam if it is $4\mathrm{.}5ft$ from the right support.

$($b$)$ The flexural stress at point $B$ on section A$-$A through the beam if it is $4\mathrm{.}5$ftfromtherightsupport.

$($c$)$ The maximum flexural stress anywhere in the beam.

Denote a tensile stress as a positive value and a compressive stress as a negative value.