Find an orthogonal basis of the column space of the following matrix:

A = [ -9 2 -3 0 -2 ]
[ 2 -2 8 4 0 ]
[ 1 4 -15 -12 6 ]
[ 6 -5 13 11 -6 ]

For convenience, here is the same matrix in a form that can be copied into Python code:
[[-9, 2, 3, 0, -2], [2, 2, 8, 4, 0], [1, 4, 15, 12, 6], [6, 5, 13, 11, 6]]