Given here are some figures
(1) 
(2) 
(3) 
(4) 
(5) 
(6) 
(7) 
(8) 
Classify each of them on the basis of the following:
A. Simple curve
B. Simple closed curve
C. Polygon
D. Convex polygon
E. Concave polygon
A. Simple curved figures are: 1, 2, 5, 6, 7
B. Simple closed curved figures are:1, 2, 5, 6, 7
C. Polygons are: 1, 2
D. Convex polygons are: 2
E. Concave polygon are: 1
1