an electric mortar is pumping is pumping water at a rate of 10kg/sec from the well at the depth of 40m below the gronud to a cubical water tank of side length 10m placed at the top of the building of hieght 20m from the ground if the density of the water be 1000kg/m^3 and the efficency of the motar be 80% calculate 1.P.E of the water in the tank 2.the power delivered by the mortar 3.the electric power consumed by mortar