Find the dimensions of these 4 spaces. Which two of the spaces are the same? (a) column space of A, (b) column space of U , (c) row space of A, (d) row space of U

A = [ 1 1 0 ] [ 1 1 0 ]
[ 1 3 1 ] and U [ 0 2 1 ]
[ 3 1 -1] [ 0 0 0 ]