Dense fluids exertbuoyant force then less dense fluids because they have more mass within a certain volume than a less dense fluid.

I'm having some difficulty seeing the diagram clearly.but the question says there's a net inward force on the object.so we know right away,  from newton's 2nd law of motion, thatthat baby is accelerating.  it doesn't even matter which way thenet force is pointing.  if there's any net force, then either theobject's speed or else its direction must be changing.

Ray 2 should cross through the focal point on the right side of the lens.