Answer:
Part 1
remain constant, costs from different sources
Part 2
decreases, Leverage has a tax shield due to a deduction allowed for interest
Step-by-step explanation:
Debt is another term used for Leverage. Addition of leverage does not affect the cost of equity. Cost of equity and cost of debt are costs from different sources
However, Leverage has a tax shield due to a deduction allowed for interest. Therefore as more debt is used, the cost of capital decreases. So weighted average cost of capital calculates costs from pooled resources