A pipeline 900 ft long discharges freely at a point 200 ft lower than the water surface at intake. The pipe intake projects into the reservoir. The first 600 ft is of 10-in diameter, and the remaining 300 ft is of 6-in diameter. Find the rate of discharge, assuming f = 0.06. If the junction point C of the two sizes of pipe is 150 ft below the intake water surface level, find the pressure head just upstream of C and just downstream of C. Assume a sudden contraction at C.