Due to poor scheduling, students set up a BOD test on the Monday before a holiday (initial dissolved oxygen=9 mg/L). On the third day, the students measure a dissolved oxygen of 6 mg/L and mistakenly re- aerate the sample so that the dissolved oxygen goes up to 8 mg/L. They then go home for the holiday. After an 18-day interval, they return to school and measure the dissolved oxygen to be 3 mg/L. The original sample size was 6 mL and the total sample volume was 300 mL (the balance being dilution water). Assume that the ultimate BOD was reached in 14 days and that kL=0.1 day-1. Calculate the 5-day and ultimate BOD of the sample.