A longitudinal leveling $($One point per section$)$ was performed along road centerline as follows:

$\backslash$table$[[$Station $($m$),0\mathrm{.}00,25\mathrm{.}00,50\mathrm{.}00,75\mathrm{.}00,100\mathrm{.}00,125\mathrm{.}00,160\mathrm{.}00],[$Exist Ground Elev. $($m$),54\mathrm{.}20,54\mathrm{.}20,52\mathrm{.}90,52\mathrm{.}60,51\mathrm{.}30,51\mathrm{.}00,50\mathrm{.}7]]$

Given that the elevation of the road at the start station is $56\mathrm{.}00m$ and it slopes $1\mathrm{.}0\%$ downwards. The road width is $14m$ with side is $3$:$2(H$:$V).$ It is required to:

$1-$ Calculate the cross$-$sectional areas at ALL stations,

$2-$ Calculate the volume of earthworks, using Simpson's rule, wherever applicable.

$3-$ Calculate the volume of earthworks, using trapezoidal rule.