Estimate the screen requirement $($i$.$e$.$ gross width of screen, number of bars, length of screen$)$ for a plant treating a peak flow of $60$ MLD of sewage. Assume that velocity through the screens at peak flow is $0\mathrm{.}8$ m$/$s and water depth is $1$m$.$ Assume rectangular steel bars in the screen $($at $60\backslash$deg to the horizontal$)$ with $1$ cm width and placed at $5$ cm clear spacing. Also calculate the head loss for clean screens.