Three charges of 3.02 μC, 7.36 μC, and 8.11 μC are located at the points (2.00, 7.00) m, (4.00, 7.00) m and (4.00, 3.00) m, respectively. (a) What is the magnitude of the combined field due to these charges at the point (2.00, 3.00) m? (b) What is the direction of the combined field there (as an angle between 0° and 360°)?