Draw the above grid $(30m20m)$ using a scale of $1$:$1000.$

Draw the contour lines $100$ and $101($ create a table to show all points and sample

interpolation$)$

Calculate the gradient line connecting points $D$ and $N.$

Draw the longitudinal section of the roadway connecting A and $G,$ knowing the suggested

road level at $A$ to be $100\mathrm{.}3m$ and rising at a gradient of $1$ to $90$ ; use a horizontal scale of

$1$:$1000$ and a vertical scale of $1$:$25.$

Compute the depth of cut or fill at points $C$ and $E.$