Find the area of the region between y = x + 3x and the x-axis for the following intervals. (a) from 3 to 0 (b) from -4 to 0 (c) from -3 to 2 (a) The area from -3 to 0 is (b) The area from -4 to 0 is 9 2 19 3 (Simplify your answer.) (Simplify your answer.) (c) The area from -3 to 2 is (Simplify your answer.)