Marine Expeditors has three divisions. Division A is the core of the business and represents 80 percent of the firm's operations. Division B is involved only with contractual short-term projects and therefore has about 8 percent less risk than division A. Division C develops and markets new products and is about 12 percent riskier than division A and about equal in size to division B. The manager of division A has suggested that the operations of his division be increased by 10 percent next year. The proposed project should probably be assigned a required return that is equal to _____ percent of the firm's weighted average cost of capital