Vector A has a magnitude of 8.20 units and makes an angle of 47.5 with the positive x-axis. Vector B also has a magnitude of 8.00 units and is directed along the negative x-axis. Using graphical methods find the following. (a) The vector sum A + B. Magnitude of A + B: Direction of A + B: (b) The vector difference A - B. Magnitude of A - B: Direction of A - B: units counterclockwise from +x-axis units counterclockwise from +x-axis