2. Given below are subsets of different vector spaces. Determine whether or not each subset is a subspace. You must prove your claim either way. a 2a1 a. The subset of M32 consisting of all matrices of the form 3a 4a 5a 6al b. The set of all polynomials in P₂ of the form ax² + bx + c, where c≥ 0.

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