A rectangular weir $($with a coefficient of $2\mathrm{.}75)$ was installed in an agricultural farm to measure water

discharge in an irrigation canal. The fixed length of the weir is $20$ cm and the height of water

measured at a certain time point was $8$ in $.$ Calculate the discharge in $f\frac{t^3}{s}.($all units must be converted

to ft $,$ and then apply the discharge equation give in lecture slide$).(10$ points$)$