Determine if the set of polynomials is linearly independent or dependent: (7x- + 9x + 2, -4x2 - 4x + 12, 2x -4) Independent O DependentGiven the matrix: 8 A = LNON OOO U ON a Let R(A), C(A) and N(A) denote the row-space, column-space and nullspace of A, respectively. a) dim R(A) = 4 b) dim C(A) = 4 c) dim N(A) = 0