Please show your solutions neatly in paper.I will give you a very good feedback. Thank you! IN PAPER PLEASE :(

3. A tank is filled with water to a height H. A hole is punched in one of the walls at a depth h below the water surface. Show that the distance x from the foot of the wall at which the stream strikes the floor is given by x=2./h (H-h). Assume that the water leaves the hole horizontally.4. A square plate with edge length 9.10 cm and mass 488 g is hinged along one side. If air is blown over the upper surface only, what speed must the air have to hold the plate horizontal? The air has density 1.21 kg/ms. (Hint: Apply the principle of the dynamic li