Suppose that the area of the region between the graph of a positive continuous function f(x) and the x-axis from x = a to x = b is 15square units.

Find the area between the curves y = f(x) and y = 5f(x) from x = a toX = b. A. 90 square units B. -60 square units C. 60 square units D. -90 square units E. None of the other choices.