Question $5(9$ marks$)$

Given the below Digital Elevation Model $($DEM$)$ in a grid network data structure, replicate the grid network in your answer sheet and draw each of the items in an individual diagram.

$($a$)$ Draw the flow direction $($with arrow in each grid$)$ using the deterministic eight$-$node $($D$8)$ based on the single flow direction mechanism.

$($b$)$ Compute the flow accumulations and fill them in a $\backslash (5\backslash$times $5\backslash )$ table.

$(4$ marks$)$