Determine if the following is a vector spaces. Please justify your answer. Q: The set of all 2x2 matrices of the form {{a,b},{c,-a}} Q: the set of all bectors of the form {{a-1},{a+1}} Q: the set of all even polynomials p(x) = p(-x) Solution U= V= A B D E C -A F -D W=PU+QV= PA+QD PB+QE.