(1 point) Let P2 be the vector space of all polynomials of degree 2 or less, and let H be the subspace spanned by 12x2 + 27x + 16, 5x2 + 12x + 7 and — (8x2 + 21x + 12). a. The dimension of the subspace H is 1 b. Is {12x2 + 27x + 16, 5x² + 12x + 7, – (8x² + 21x + 12)} a basis for P2? choose Be sure you can explain and justify your answer. c. A basis for the subspace H is { }. Enter a polynomial or a comma separated list of polynomials.