Question (3) in question 1 can be asked: How many planar graphs are there? How many three-dimensional figures are there? The answer lists the addition formula itself. I don't know if you are right because I can't see the graphics clearly. If you count them, they are: plane graphics: 3+4+4 = 15 (pieces), and three-dimensional graphics: 4+4+4= 12 (pieces).

Question (2) in Question 2 can be asked: How many kinds of aquatic animals are there? How many land animals are there? Just count the answers yourself.

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