Part 1 - Molasses and fish On September 10, 2013, approximately 1,400 tons (233,000 gallons) of unprocessed molasses accidentally spilled from a Matson cargo ship into Honolulu Harbor. The spread of the unprocessed molasses was in all directions since the water in Honolulu Harbor was calm. This stochastic event caused dissolved oxygen (DO) to decrease and low DO (less than 4.00 mg/1) in water resulted in a fish kill of greater than 4,000 fish in a relatively short amount of time. Normal DO (greater than 4.00 mg/1) levels returned within a week as the molasses naturally diffused or consumed by marine life. These observations were conducted by state researchers, who started performing water tests the day after the molasses spill. All testing ended on September 18, 2003, when DO concentrations returned to normal conditions. 1. Assuming the polluted water was circular, determine how fast the radius of the circle was changing when the area of the circle was 1600aft and increased at a rate of 40aft2 /sec. *Hint: start with the area of a circle and rewrite to solve for r then find the derivative. Substitute variable(s) and multiply it by the rate of increase. You must show at least 2 problem solving steps and round to one decimal place for full credit. Note: substitutions are a problem solving step. (2 points)