2529 I A vertical plate is submerged (or partially submerged) in water and has the indicated shape. Explain how to approxi- mate the hydrostatic force against one side of the plate by a Riemann sum. Then express the force as an integral and eval uate it. 26. \"II 4ft J 3ft 30. A milk truck carries milk with density 646 lb/ft3 in a hori zontal cylindrical tank with diameter 6 ft. (a) Find the force exerted by the milk on one end of the tank when the tank is full. (b) What if the tank is half full