[Select all relevant.] If securities markets are weak-form efficient, then: studying historic price movements cannot earn an investor a return greater than the required rate. fundamental analysis will not find any bargains. returns greater than required rates cannot be earned except by chance, because all relevant information is already incorporated into prices. [Select all relevant.] A firm's marginal cost of capital is the: discount rate used to evaluate the cash flows of investment projects with the same risk as the firm's existing assets. minimum rate of return that investors require for providing capital to the company weighted average of the cost of the debt and equity provided to the company by all investors and creditors. | rate of return the firm must earn on its investments, in order to maintain its stock price. none of these