Can you please answer this question for me thank you so much

4. Consider the functionsx) = fl and 3(1) = 4x . Let R denote the region in the first I + :c +1 quadrant bounded by the curves _v =x} and y = 3(1). Find the exact volume of the solid that has R as its base if everyr cross section by a plane perpendicular to the x-axis is a rectangle of height 3. ("Exact volume" means no calculator numbers.)