Please show steps clearly. I will up vote Quick response will be greatly appreciated

a) ABC Company is currently an all-equity firm that pays no taxes. The market value of the firm's equity is $2 million. The cost of this unlevered equity is 18% per year. ABC plans to issue $400,000 in debt and use the proceeds to repurchase stock. The cost of debt is 10% per year. (i) After the repurchase, what will the cost of equity be? (ii) After ABC repurchases the stock, what will the firm's weighted average cost of capital be? Do the calculations