The function f(x) = 4x" and its tangent line at x = e IS shown. Each tick mark on the graph is in steps of e. 13.59 The y-intercept of the tangent line is (0, - 4e). Complete 10.87- parts a-b below. 8.15 5.44- 2.72- X 0- -2.72- 272 5 44 8-15 5.44- 8.15- -10.87- -13.59 a. What is the instantaneous rate of change of f(x) = 4x ) at x =e? (Round to the nearest integer as needed.)