The given data in Table $13$ was collected for a stream at a gauging station. Using the mean section method, estimate the discharge at the section. Show clearly all the intermediate calculations.

Table $13$

$\backslash$table$[[\backslash$table$[[$Distance from the left$],[$bank $($m$)]],$Depth $d(m),$Velocity below water surface $)],[$At $0\mathrm{.}6$d$,$At $0\mathrm{.}2d,$At $0\mathrm{.}8d$