Let p2 be the vector space of all polynomials of degree 2 or less, and let h be the subspace spanned by 1−2x, 3x^2−1 and 5−(12x^2+2x). (a) the dimension of the subspace h is (b) is {1−2x,3x^2−1, 5−(12x^2+2x)} a basis for p2? 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.