Check the boxes of the points where the graph has an global maximum

A. a
B. b
C. c
D. d
E. e
F. r
G. s
H. t

Check the boxes of the points where the graph has an global minimum

A. a
B. b
C. c
D. d
E. e
F. r
G. s
H. t

Check the boxes of the points where the graph has a local maximum

A. a
B. b
C. c
D. d
E. e
F. r
G. s
H. t

Check the boxes of the points where the graph has a local minimum

A. a
B. b
C. c
D. d
E. e
F. r
G. s
H. t