Good Afternoon can someone please work out the answer to this question Thanks very much!

Using the following information of a firm, find out its a) post-tax cost of debt, b) interest tax shield, and c) WACC. Market price of share =$125. Number of shares outstanding =150 million. Short-term debt =$145 million. Long-term debt =$275 million. Expected stock return =11.5%. Interest rate of all debt =5.5%. Preferred Equity =$65 million. Cost of preferred equity =7.5%. Tax Rate =18%. Show all your works, steps, and calculations. You may upload a word or excel file