3- A town of 500,000 sends 0.5m3 of wastewater per person per day to the wastewater treatment plant. A conventional circular primary clarifier would be designed to have an average detention time of 3 hours and an average overflow rate of 50 m/d, whereas a high-rate clarifier would have an average overflow rate of 2,000m/d. a) What would be the dimensions of the conventional clarifier (Surface area Ab, diameter db, and depth Db )? b) How much area would be saved by using a high-rate clarifier