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According to the graph above, calculate the value the activation energy of the reaction by using Arrhenius Law. Given Y-intercept = 9.2, X-intercept = 4.0, gradient = -2.3 and gas constant, R = 8.314 kJ/mol.K.

a. 19.12kJ/mol

b. 19.12kJ/mol.k

c. 1.107kJ/mol

d. 1.107kJ/mol.k