Water is being heated in a closed pan on top of a range while being stirred by a paddle wheel. During the process, 30 kJ of heat is transferred to the water, and 5kJ of heat is lost to the surrounding air. As a result of theheattransfersand stirring the water, the internal energyof the waterincreasesby25.5kJ. Determine the shaft work that needs to be supplied to the stirrer if the mechanical efficiency if the stirrer is 0.95.