Confused. I pass the test if I do this (but the plot I get is reflection about y axis not as epected)

# Find eigenvalues and eigenvectors or matrix A_reflection_yaxis.

A_shear_x_eig =np.linalg.eig(A_shear_x)

### END CODE HERE

However I fail the test if I do this but at the same time I get the lot correct as expected

# Find eigenvalues and eigenvectors or matrix A_reflection_yaxis.

A_shear_x_eig =np.linalg.eig(A_reflection_yaxis)