A water system consists of two bends with a friction factor of 0,75 (k = 0,75), a filter with a length-to-diameter ratio of 110 and a pressure valve with a length- to-diameter ratio of 150. The pipe of the water system has a diameter and length of 32 mm and 15 m, respectively. The pipe has a friction coefficient of 0,0013. The water system entrance is 3 m above the pipe system exit. The flow rate through the system is 1,8 l/s. Calculate the following: 4.2.1 4.2.2 4.2.3 The total length-to-diameter ratio of the water system The total head loss of the water system using Darcy's equation The pressure at the exit if the inlet pressure to the water system is 500 kPa