The corresponding Rankine cycle for an actural power plant(using water) runs at a high pressure of 6.3MPa, a low pressure of 0.01 MPa, and a high temperature of 779K. The actural entropy increase in the pump is 0.2 kj/(kg K). Despite the insulation, heat loss by the pump is 1 kj/(kg K). Calculate the second law efficiency of the pump. The environment i at 298 K and 0.1 MPa.