pls help!! if u could write out steps that would be great-preferably using the power rule, thanks.

second. . 5. Rate of Change . . A bicyclist is riding on a path modeled by the function f(x) = 0.04(8x - x2), where x and f(x) are measured in miles (see figure). Find the rate of change of elevation at x = 2. 2 f(x) = 0.04(8x -x2) 1 - X 1 2 3 4 5 6