Determine the point groups for
a. A flat oval running track
b. A jack (child's toy)
c. A person's two hands, palm to palm
d. A rectangular towel, blue on front, white on back
e. A hexagonal pencil with a round eraser
f. The recycle symbol, in three dimensions
g. The meander motif
h. An open, eight-spoked umbrella with a straight handle
i. A round toothpick
j. A tetrahedron with one green face, the others red
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