dY (t ) The solution trajectories in the phase plane of a 2 x 2 linear system = AY with con- dt stant coefficients is shown below. Which of the following best describes the eigenvalues of he system pictured in the phase plot? (a) two real positive eigenvalues (b) two real negative eigenvalues (c) one real positive eigenvalue, one real negative eigenvalue d) complex conjugate pair of eigenvalues of the form a + bi where a > 0 (e) complex conjugate pair of eigenvalues of the form a + bi where a