Please explain with graphs for a and b and solve for c and d

\"a\" a) Graph the function f(x) = 3x2 + 6x. b) Draw the tangent lines to the graph at the points whose x~coordinates are - 2, - 1, and O. c) Find f' (x) by determining lim w. h>0 h d) Find f'(- 2). f'(- 1), and f'(0). These slopes should match those of the lines in part (b)