118. Solving a chemistry problem

101. The following table contains the results of measurements of the surface concentration of β-casein protein G at the aqueous solution / oil interface depending on its concentration in solution (22 ° C):
-lgP, weight:% 6.00 5.53 5.16 4.81 4.11 3.55 3.07 2.69 2.30 2.00 1.90
G, mg/m2 0.20 0.40 0.99 1.38 2.44 2.75 2.78 2.72 2.75 3.67 4.28

Build a graph of the dependence of G on -lgP and determine from it the concentration at which the filling of the first monomolecular layer ends and polymolecular adsorption begins. Using data that refer to a concentration lower than the concentration of the onset of polymolecular adsorption, determine the coefficients of the Langmuir equation and then the area occupied by 1 protein molecule in a saturated monolayer (molar mass of β-casein 24 kg/mol).