4. Select the COMPLEX PLANE tab above the graph to view the plane that complex numbers can be graphed on. To graph a complex number on the complex plane, graph the real part on the horizontal axis and graph the imaginary part on the vertical axis. So, to graph a + bi on the complex plane, plot the point (a, bi). A. Graph the function y = x2 - 4x + 7 in the Gizmo. What are the solutions of the related quadratic equation x2 - 4 x + 7 = 0? B. Look at the solutions plotted on the complex plane. Mouseover the blue points. What are the coordinates of the points? ) and ( C. How do the coordinates correspond to the parts of the complex solutions? D. Switch back and forth between the REAL PLANE and COMPLEX PLANE tabs. How does the real part of both complex solutions relate to the parabola on the real plane? E. With the COMPLEX PLANE tab selected, vary the sliders until the solutions lie on the real axis of the complex plane. Select the REAL PLANE tab. What do you notice about the solutions in this case