### 4 You prepare four solutions: Solution 1: Reactants + enzyme at ( 40^{circ} mathrm{C} ) (about ( 100^{circ} mathrm{F} ) ) and ( mathrm{pH} 7 ) Solution 2: Reactants + enzyme at ( 40^{circ} mathrm{C} ) (about ( 100^{circ} mathrm{F} ) ) and ( mathrm{pH} 1 ) Solution 3: Reactants + enzyme at ( 20^{circ} mathrm{C} ) (about ( 70^{circ}

4 You prepare four solutions: Solution 1: Reactants + enzyme at ( 40^{circ} mathrm{C} ) (about ( 100^{circ} mathrm{F} ) ) and ( mathrm{pH} 7 ) Solution 2: Reactants + enzyme at ( 40^{circ} mathrm{C} ) (about ( 100^{circ} mathrm{F} ) ) and ( mathrm{pH} 1 ) Solution 3: Reactants + enzyme at ( 20^{circ} mathrm{C} ) (about ( 70^{circ}