Im trying to solve this problem but I don't know how to do It.

1. (10pts) The figure is in the other file. The curve of y = f(x) is shown below. Point out at which point x = a among a = 1, 2, 3,4, 5,6,7 the following statements are true. (a) x = a are local minimum points of f(x). (b) x = a are local maximum points of f(x). (c) x = a are critical points of f (x). (d) x = a are inflection points of f (x). (e) x = a are absolute maximum points of f (x) over the range 1