10 11. A student measured the concentrations of the reactants and product in a reaction as follows: Time (min) 0 26 44 70 120 Reactant A [MM] 5.39 4.41 3.38 2.72 2.05 1.37 Instantaneous Rate 0.082 0.052 0.031 0.0187 0.082 [mM/min] Based on the background knowledge, he decides to use a 2nd order reaction to fit the data. Find the reaction rate and the goodness of fit (minimized x'). (8+4 = 12 marks)