Consider multiple pipes of different length and diameter in series. if an incompressible fluid flows steadily through the system, what can we say about the volumetric flow rate in each pipe? what is the total head loss?

A12 mm diameter shaft runs in a plain cylindrical bush 30 mm long that is located in an 18 mm diameter hole in a housing. the shaft-inner bush fit is h8 f and the outer bush-housing fit is h7-p6. make a fully cimensioned sketch of the bush with tolerances. find the maximum and minimum clearance or interference for both fits on the inner and outer diameters of the bush