In a U-tube, the cross-sectional area of the limb on the left is one-quarter the area of the limb on the right. The U-tube contains mercury. What can be inferred from this information?
1) The pressure on the left limb is four times greater than the pressure on the right limb.
2) The pressure on the right limb is four times greater than the pressure on the left limb.
3) The pressure on the left limb is the same as the pressure on the right limb.
4) The pressure on the left limb cannot be determined from the given information.
