The lake's surface area is $10k{m}^2.$ This region's historical observations in March show that

the average inflow, precipitation, seepage loss, and outflow are estimated to be $1\mathrm{.}5\frac{m^3}{s},150$

$m\frac{m}{?}$ month, $8m\frac{m}{?}$ month, and $1\mathrm{.}4\frac{m^3}{s},$ respectively. The lake storage at the beginning and

end of the month is the same, and no change was observed. Compute the average evaporation

in $m\frac{m}{m}$onth for March.