(a) A 4.8 m3 cylindrical tank with a flat bottom is to be converted into an agitation tank with a flat blade turbine agitator with six blades, determine the diameter of the tank (Dt) (state and justify your assumption to determine (Dt). Given that the turbine diameter (Da) is 0.61m and the width (W) is 0.122m. The tank is to contain four baffles, each having a width J of 0.15m. The turbine is operated at 90rpm and the liquid in the tank has a viscosity 12cp and a density of 929kg/m3. Calculate the required (power) kW of the mixer.