can you please help with this

Water (density 1000kg/m3 ) is contained by a flat, rigid, massless gate that is hinged in its center. The gate has dimensions a=1m,b= 1m,c=2m, and is d=3m wide into the page. The air above the water and on the right side of the gate is at atmospheric pressure. The gate is held closed by a horizontal force, F, applied at the point shown. (a) Draw a free body diagram of the gate. (b) Calculate the minimum force, F, required to h