Step 1: Understanding the Concept:
Balance the redox reaction using half-reaction method.
Step 2: Detailed Explanation:
Balanced equation: $5\mathrm{I}^- + \mathrm{IO}_3^- + 6\mathrm{H}^+ \rightarrow 3\mathrm{I}_2 + 3\mathrm{H}_2\mathrm{O}$. Coefficients: 5, 1, 6.
Step 3: Final Answer:
The coefficients are 5, 1, 6.