3. Experiments were pertormed to charactenze the adsorption of the widespread pesticide atrazine (AT) to a particular activated carbon fiber product, in water. The experiment involves a number of samples, each with 20mg of activated carbon in 250mL of water containing varying initial concentrations of AT. It was found that to reach equilibrium required about 48h. After this time, the activated carbon was removed and the final dissolved atrazine concentration was measured. These were the results: a. Calculate q for each sample and fit the data to the Langmuir and Freundlich models to extract the best-fit values of the two parameters for each model. (Benjamin section 13.3 has information on how to linearize the models and extract parameters from linear fits.) b. On a single plot, show lines for the best-fit Langmuir and Freundlich isotherms using the parameters you found, and points for the actual data. It should look kind of like this: Which model seems to fit the data better? c. Using the best-fitting model, calculate the loading of activated carbon necessary to reduce the atrazine concentration of a water from an initial level of 2.8g/L to a target level of 1.0g/L