What is the levered beta (range) for the Refining and Marketing division using a target D/E ratio? Corporate tax rate to be considered as 2006 tax rate (Exhibit 1) for Midland Energy Resources up to 2 decimal places XXXX% Select one: O a. 0.92-1.20 O b. 0.80-0.89 O c. 1.50-1.60 O d. 0.50-0.70 O e. None of the options are correct