Two spherical objects, A with mass M = 3 kg and B with mass MB = 12 kg, are glued to a table with their centers separated by a distance of 21 cm. Take the perspective that both lie on the x-axis, with A on the left and B on the right. A. Draw a sketch of the setup showing objects A and B. Explain why the field from both objects cannot equal zero either to the left of A or to the right of B. B. Find where the net gravitational field due to the two masses is zero. Give your answer as a distance (in cm) from object A.