6. The figure below shows x, y, and z axes of a coordinate system and an electromagnetic wave, with electric field represented by red lines and the magnetic field represented with blue lines. The figure also singles out a point on the beam's path, labeled with P. Print out the next to the last page of this assignment, which has almost an identical figure. (b) Label with black dots all the points on the beam's path at which the electric field is zero. (c) Label with green dots all the points on the beam's path at which the electric field is the strongest and pointing in the positive z direction. (d) Label with red dots all the points on the beam's path at which the electric field is the strongest and pointing in the negative z direction. (e) Imagine we place a positively charged particle at point P at the moment picture above. In what direction would a positive charge be pushed? What if we placed a negative change there? 7. Extra Credit: The figure below shows two electric charges of the same strength, but different sign and a point in space P. Either print this page or sketch the same drawing in your homework. a. Draw an arrow at point P representing the electric field of the negative charge at that point. b. Draw an arrow at point P representing the electric field of the positive charge at that point. c. Draw an arrow at point P representing the total electric field due to the combined effects of the two charges. -4