5. Enzyme Whatase has a broad pH optimum and has 100% catalytic activity at both pH 6.5 and pH 7.6. Compound X is a potent competitive inhibitor of Enzyme Whatase at pH 6.5 but has no inhibitory activity at pH 7.6. Provide an explanation (with rationale) for the differences in the effect of Compound X on the activity of Whatase at these two pH's.