Please complete all parts of the equation: Including D which is not listed:

D) Now suppose that Stodgy's Management suddenly decides that it could use a little more excitement. Specifically, it decides to increase Stodgy's debt-to-value ratio (in market value terms) to 80%. Using your answers to (b) and (c), find Stodgy's new levered cost of equity and its new weighted average cost of capital for the new capital structure. Can you cite any reasons why you should be cautious in using the new cost of capital figures that you have calculated?