An iodine-clock kinetics experiment was performed by varying the composition of reactant solutions and measuring the resulting rates of reaction. 1st column: reactant solution a; reactant solution b; time to complete reaction2nd column ‘trial 1’: 10.0 ml i-(aq), 5.0 ml s2o2-3(aq); 10.0 ml i-(aq)5.0 ml s2o2-3(aq); 10 seconds3rd column ‘trial 2’: 5.0 ml i-(aq)5.0 ml s2o2-3(aq); 10.0 ml s2o2-8(aq)1.0 ml starch(aq); 20 seconds4th column ‘trial 3’: 5.0 ml s2o2-8(aq) 1.0 ml starch(aq); 10.0 ml s2o2-8(aq)1.0 ml starch(aq); 20 seconds how do trials 2 and 3 in the above table differ? a. trial 2 has half as much starch as trial 3. b. trial 2 has twice as much i- as trial 3. c. trial 3 has twice as much s2o2-8 as trial 2. d. trial 3 has half as much s2o2-3 as trial 2. four mechanisms have been proposed to explain the results in the table. mechanism 1: i-(aq)+i-(aq)-> i2-2(aq) (slow) i2-2(aq)+s2o2-8(aq)-> i2(aq)+so2-4(aq)(fast) mechanism 2: i-(aq)+s2o2-8(aq)-> [s2o8∙i]3-(aq) (slow) [s2o8∙i]3-(aq)+i-(aq)-> i2(aq)+2so2-4(aq) (fast) mechanism 3: i-(aq)+s2o2-8(aq)< -> [s2o8∙i]3-(aq) (fast) [s2o8∙i]3-(aq)+i-(aq)-> i2(aq)+2so2-4(aq) (slow) mechanism 4: 2i-(aq)+s2o2-8(aq)-> i2(aq)+2so2-4(aq) of the proposed mechanisms, which would be supported by the results in the table? mechanism 1 mechanism 2 mechanism 3 mechanism 4