Methyl red is a pH indicator. It turns red if the pH drops to 4.4 or lower, and turns yellow in solutions of pH 6.2 or higher.

(a) At what concentration of H+ does methyl red turn red?

(b) At what concentration of H+ does methyl red turn yellow?

(c) What color will methyl red turn if the concentration of H+ is 3.2×10−4 M?