If a chosen firm grows at its internal growth rate, increasing assets only with its retained earnings, how will this likely affect its WACC? Show calculations. If a chosen firm grows at its sustainable growth rate with increases in both its retained earnings and debt, maintaining a constant debt ratio, how will this affect its WACC? If a chosen firm attempts to grow faster than its sustainable growth rate with modest increases in its debt ratio, how will this likely affect its WACC? What about very large increases in its debt ratio? Explain