Vector A has a magnitude of 8.00 units and makes an angle of 45.0 with the positive x-axis. Vector B also has a magnitude of 8.00 units and is directed along the negative x-axis. (a) Using graphical methods, find the vector sum A + B. (Submit a file with a maximum size of 1 MB.) Choose File No file chosen This answer has not been graded yet. (b) Using graphical methods, find the vector difference A - B. (Submit a file with a maximum size of 1 MB.) Choose File No file chosen This answer has not been graded yet