Consider two pointlike objects ill-1' 1 and ill-1'2r with ill-I1 having four times the mass of ill-1'2. They are placed a distance d apart from each other. (a) Sketch (in 2dirnensions) the gravitational eld lines that are present in the region of space around the two masses. Show the direction of the field on the field lines. 0)) Explain quantitatively where you should place a test particle such that. it experiences a net gravitational force of zero from the two pointlike objects. Indicate this position on your diagram