Identify the firm’s three major capital structure components, and give their respective component cost symbols.

Why should the cost of capital be calculated as a weighted average
of the various types of funds a firm generally uses, not the cost of
the specific financing used during a given year?

Identify the firm’s three major capital structure components, and
give their respective component cost symbols.
Why might there be two different component costs for common
equity? Which is the one that is generally relevant, and for what
type of firm is the second one likely to be relevant