$1($b$).$ Find expressions for the hydrostatic water pressure and uplift pressure forces for the Overflow section Gravity Dam $($built of concrete, ${}_c=24kN.m^{-3})$ as shown in the figure below $($in terms of $h_2,H,{}_w,)$ if the upstream face is inclined and downstream face inclined at an angle $$ as indicated with a tailwater or D$/$S water depth $H_4$ when the velocity of approach of U$/$S flow is $V_3.$ The drainage gallery locat. fram the U$/$S heel of the dam. Draw appropriate pressure diagrams.