Water discharges from a reservoir through a 100 mm diameter pipe 15 m long which rises to its highest point at B, 1.5 m above the free surface of the reservoir, and discharges direct to the atmosphere at C, 4 m below the free surface at A. The length of pipe LAB from A to B is 5 m and the length of pipe LBC from B to C is 10 m. Both the entrance and exit of the pipe are sharp and the value of f is 0.08. Calculate (a) the mean velocity of water leaving the pipe at C and (b) the pressure in the pipe at B.