Ellipse tilt angle, major and minor axis

I found this code, http://web.cvxr.com/cvx/examples/cvxbook/Ch08_geometric_probs/html/min_vol_elp_finite_set.html which generates an ellipse that encompass the points. It has A matrix and b vector. From other resources I found A matrix maximum and minimum eigenvalues sqrt(λmax) and sqrt(λmin) represent the major and minos axis of the ellipse. But it wasn't like that with the program above.

From the program, major and minor axis with tilt angle must be output. I am looking for a help