Sorbic acid, CH3CH=CHCH=CHCO2H (pKa = 4.77), is widely used in the food industry as a preservative. For example, its potassium salt (potassium sorbate) is added to cheese to inhibit the formation of mold. A) What is the pH of 0.41 M of potassium sorbate solution? Express your answer using two decimal places.