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I need the answers to exercises 1, 2, and 3 but using integral method

Integral method Exercise 1. Based on the data collected in table determine the rate constant and the order of irreversible chemical reaction: Case 1:2AB Case 2:A2B+C Assume that at the initial time, only compound A was present in the apparatus and its concentration was CA0=5mol/m3. Exercise 2. A certain chemical compound decomposes in the gas phase according to the stoichiometric equation A1=2A2+2A3 Studies on the kinetics of this decomposition were carried out in a closed isothermal batch reactor with a constant volume at a temperature of 300K. Initially, only substrate A1 was present in the reactor. Determine the kinetic equation of this reaction based on the results of measuring the total pressure in the apparatus. The results are summarized in the table