25. Multiple Correct: In the open manometer shown, water occupies a part of the left arm, from a height of y1 to a height of y2. The remainder of the left arm, the bottom of the tube, and the right arm to a height of y3 are filled with mercury.
Which of the following is correct? (Select two answers.)
(A) the pressure at a height y3 is the same in both arms.
(B) the pressure at a height y2 is the same in both arms.
(C) the pressure at the bottom of the right arm is the same as at the bottom of the left arm.
(D) the pressure at a height y3 is less in the left arm than in the right arm.