A simply supported horizontal beam is $1\mathrm{.}5$ m long and has a cross$-$sectional dimension of and $.$ The beam is subjected to vertical point loads at $0\mathrm{.}5$ m and $1\mathrm{.}0$ m from the support. The beam is also subjected to an axial tensile force of $,$ which acts at the ends, $25$ mm above the cross$-$sections centroid.$($a$)$Determine and plot the normal stress distribution over the cross$-$section at the midpoint.$($b$)$At what eccentricity $($measured from the centroid$)$ of the axial load does the compressive stress at the top of the beam disappear?Please show me how, a$)$ Top edge: sigma $=-10$ MPaBottom edge: sigma $=26$ MPa and b$)$ e$=45,8$ mm