If a + b + c = 0, then which of the following are correct?

1. a^3 + b^3 + c^3 = 3abc

2. a^2 + b^2 + c^2 = -2(ab + bc + ca)

3. a^3 + b^3 + c^3 = -3ab(a + b)
Select the correct answer using the code given below:

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