Extracted text: 5) Two reservoirs have a minimum difference in water-surface elevation of 40 m and are connected by a 5000 m long, 0.2 m diameter pipe of roughness 0.03 mm. The entrance and exit loss coefficients are 0.8 and 1.0, respectively. a) Determine the minimum discharge in the pipe for this condition. b) It is desired to increase the discharge to 0.05 m3/s by using an equivalent diameter pipe with a roughness of 0.015 mm placed in parallel to the existing pipe. Determine the length of this second pipe. Ignore minor losses. 40'