Determine whether the set W is a subspace of R3 with the standard operations. If not, state why. (Select all that apply.) W = {(x1x2, X1, X2): X1 and x2 are real numbers} O W is a subspace of R3. W is not a subspace of R3 because it is not closed under addition. OW is not a subspace of R3 because it is not closed under scalar multiplication.

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