Currently, Warren industries can sell 10-year, $1000-par-value bonds paying annual interest at 9% coupon rate. As a result of current interest rates, the bonds can be sold for $990 each before incurring flotation costs of $30 per bond. The firm is in the 30% tax bracket. a.) find the net proceeds from the sale of the bond, Nd b.) Calculate the bonds yield to maturity (YTM) to estimate the before-tax and after-tax costs of debt. c.) use the approximation formula to estimate the before-tax and after-tax costs of debt. please show work