STK-Inc., who is taxed at•$0.20•of-every dollar earned, has a debt-to-equity ratio of 1/5, where its equity totals $1,200,000- debt and equity-investors require-8.5% and 9.75%, respectively; what is-YSJ Inc.'s WACC, and how are your computations impacted if the-D/E is lowered to-15%(show-all your work)?1