with calculation please

A firm has determined its optimal structure which is composed of the following sources and target market value proportions, long-term debt 45% and common stock equity 55%. Debt: The firm can sell a 16-year, $1,000 par value, 11 percent bond for $1,030. A flotation cost of 1 percent of the face value would be required. Additionally, the firm has a marginal tax rate of 35 percent. Common Stock: the firm's common stock is currently selling for $75 per share. The stock must be underpriced by $3 per share, and the flotation costs are expected to amount to $2 per share. The firm expects to pay cash dividends of $4.20 per share next year. The dividends paid on the outstanding stock over the past 5 years (2010-2014) were as follows: Year 2014 2013 2012 2011 2010 Dividend 3.94 3.70 3.42 3.12 3.00 Calculate the weighted average cost of capital up to the point when retained earnings are exhausted? 1