Define each of the following terms- weighted average cost

Question

Define each of the following terms:

a. Weighted average cost of capital, WACC; after-tax cost of debt, r_d(1 - T)

b. Cost of preferred stock, r_ps; cost of common equity or cost of common stock, r_s

c. Target capital structure

d. Flotation cost, F; cost of new external common equity, re.