Unida Systems has 36 million shares outstanding trading for $9 per share. In​ addition, Unida has $99 million in outstanding debt. Suppose​ Unida's equity cost of capital is 15%​, its debt cost of capital is 7%​, and the corporate tax rate is 30%. a. What is​ Unida's unlevered cost of​ capital? b. What is​ Unida's after-tax debt cost of​ capital? c. What is​ Unida's weighted average cost of​ capital?