Fig. 6

Note [1], [6], [11], [16], [21] show the graphs of the imaginary part of Eq. (20), and [2], [7],[12], [17], [22], and [4], [9], [14], [19], [24], and [3], [8], [13], [18], [23], and [5], [10], [15], [20], [25] show graphs of z,y-axis orientation and the contour graphs of z,y-axis orientation, respectively, for \(\beta =0.1, 0.3, 0.5, 0.7, 0.9.\).