4- For the experimental adsorption isotherm data given below, determine whether Freundlich or Langmuir model fits the data best. Report the isotherm parameters with appropriate units for the model providing the best fit. (Note: Use Excel for fitting the models to data using linear regression and compare resulting R values for determining the best fit) a) b) q C (g/L) q (ug/g) C (mg/L) (mg/kg) 0.13 74.33 0.55 0.74 0.17 91.14 6.4 6.9 0.32 115.84 11.3 9.7 3.88 314.97 17.6 12.5 6.95 442.27 34.2 16.3 23.6 778.18 57.8 18.9 44.9 983.37 86.7 20.4 115.1 21.6 141.3 21.8