26. Solving a chemistry problem

4. Known data on the current concentration of substance A (expressed as a percentage) during the course of a reversible first-order reaction
Time, min 0 40 70 100 140 170 equilibrium
Current concentration A,% 100 85.6 76 68.4 59 53.8 17.1
Necessary:
1) build a kinetic curve;
2) construct an anamorphosis of the kinetic curve;
3) determine the rate constants of the forward and reverse stages.