-20. Continuing the preparation of the proposal for the Waffle treatment plant (Problem 6-15), design the flocculation tank by providing the following for the first two compartments only: 1. Water power input in kW 2. Tank dimensions in m 3. Diameter of the impeller in m 4. Rotational speed of impeller in rpm Use the following assumptions: 1. Number of tanks =1 (with 1 backup) 2. Tapered G in three compartments: 60,50 , and 20s1 3. Detention time =30min 4. Depth =3.5m 5. Impeller type: axial-flow impeller, three blades, Np=0.43 6. Available impeller diameters: 1.0,1.5, and 2.0m 7. Assume B=(1/3)H