Find the work required to move an object in the force field Fequalsleft angle x comma 4 right angle along the straight line from A(0,0) to B(4,2). Check to see whether the force is conservative. Check to see whether the force is conservative. What is the potential function phi? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The force is conservative, phi (x comma y )equals x^2/2+4y StartFraction x squared Over 2 EndFraction plus 4 y . (Type an exact answer.) Your answer is correct. B. The force is not conservative, phi (x comma y )does not exist. Find the work.