need help with parts D and E?

Dogma Daycare has $750 debt outstanding with pretax cost of 6 percent and its common stock has a market value of $1,250. The required return on equity is 14.34 percent. Dogma faces a corporate tax rate of 21 percent. d) Dogma is planning to recapitalize by issuing $250 in debt and using the proceeds to buy back stock. i) What is the new value of the firm's debt? ii) What is the value of the additional tax shield? iii) What is the new value of the equity? iv) What is Dogma's required return on equity? e) Suppose management changes its minds and instead of issuing debt the firm will reduce leverage by issuing $250 of equity and buyback $250 of debt. What is the value of the firm's debt and equity under this scenario