Find the projection of vecb = (4, 3, 1, 0) onto the nullspace of the matrix A = beginbmatrix 1 & 1 & 1 & 1 -2 & -1 & 0 & 2 endbmatrix.
a) (2, 1, 1, 2)
b) (1, 1, 1, 1)
c) (-2, -1, 0, 2)
d) (0, 0, 0, 0)