A biological sludge from a secondary waste treatment facility is to be concentrated from 2500mg/L(C0) to 10900mg/L(Cu) in a continuous clarifier. The total Flow to the unit (Qt) is 4500m3/d. The single batch test trend is shown in Figure Q3 (Appendix I). Design this secondary Clarifier by evaluating: i) the area required for thickening in m2. [10 marks] ii) the area required for clarification in m2 and [8 marks] iii) the diameter of continuous clarifier in m. [2 marks]