Please write neatly will upvote for original answer

Problem 3: In a secondary treatment plant, the incoming wastewater with BOD5 of 190 mg/L is treated to remove 90% of the BOD. A BOD test is run after the treatment with a standard 300-ml bottle (no seed). The initial DO is 9.2 mg/L. Answer the following (10 points): a) If at least 2.0 mg/L of DO is wanted at the end of the test, what maximum volume of treated wastewater should be added in the bottle for the test. b) If half of the standard 300-ml bottle is filled with the treated wastewater, what final DO would be expected after five days