4. [1.0 pts). Tantor Supply, Inc., is a small corporation acting as the exclusive distrib of a major line of sporting goods. During 2003 the firm earned $92,500 before taxes_ (a) Calculate the firms tax liability using the corporate tax rate schedule given in bo table 1.4. (b) How much are Tantor Supplys 2003 after-tax earnings? (c) What was the firms average tax rate, based on your findings in previous parts? (d) What is the firms marginal tax rate, based on your findings in previous parts? 5. 1.0 pts. In a granh