A 1.8 km, 135 mm diameter steel pipe is used to deliver liquid product (p = 700 kg/m3, p= 0.6 x 10- N.s/m2) from a reactor to a storage tank at a flow rate of 145 m/h. A pumping unit with an efficiency of 60% is used. Assume roughness of pipe surface is 0.004 mm. (a) Determine the power supplied to the pump required. (10 marks) (b) After a while, it was found that the pressure drop reduced to 50% of its original due to pump erosion. Determine the % of change in the flow rate. (14 marks) (c) Name one (1) other parameter that can change over time and affects the power requirement of the pump. Explain