QUESTION $2-$ WATER ENGINEERING

A civil engineering project involves the design of a water supply system for a catchment arca The catchment area has an average annual rainfall of $1200mm$ and an area of $500$ hectares The evapotranspiration rate is estimated to be $800mm$ annually. Calculate the following.

$3\mathrm{.}1$ Total Precipitation over the catchment area in cubic meters.

$3\mathrm{.}2$ Total evapotranspiration from the catchment area in cubic meters.

$1\mathrm{.}3$ Net water balance for the catchment area in cubic meters, considering only precipitation and evapotranspiration.

$(3)$