First-class postage is $0.32 for the first ounce (or any fraction thereof) and $0.24 for each additional ounce (or fraction thereof). Let C(x) represent the postage for a letter weighing x oz. Use this information to answer the questions. A. C(3) $ 0.8 (Type an integer or a decimal.) B. The solution is undefined. e) Find all values on the interval (0,4) where the function is discontinuous.