The town of pittsford, ny has requested proposals for a new drinking water plant. the design flow for the plant is 0.1065m3/s. the average annual water temperature is 19°c. the following design assumptions for a rapid-mix tankhave been made: a. number of tanks: 1 (with 1 backup spare) b. tank configuration: circular with liquid depth = 2 x diameter c. retention time: 10sd. velocity gradient: 800s-1 e. impeller type: turbine, 6 flat blades, kt = np = 5.7 f. available impeller diameters: 0.45, 0.60, and 1.2m cee2712/3711g. assume b =h/3 (b=water depth below impeller)design the rapid mix system by providing the following: (a) power input in kw(b) tank dimensions in m(c) impeller diameter in m(d) rotational speed of the impeller in rpm.