7) Four blocks of the same size and shape are placed in water. Three are attached to strings as shown. All the blocks have been previously observed to float in water. Blocks A, B, and C have the same mass m and block D has a greater mass M. Blocks A and D are at the same height, but the bottom surface of block B is at the same height as the top surface of blocks A and D. i. [5 points] Sketch a free-body diagram for block A. Label all forces as we have done in class. ii. [5 points] Rank the magnitudes of the buoyant forces on each of the blocks (BAW. Baw. Bow, Bow) from smallest to largest. If any of the buoyant forces are equal, state that explicitly. Explain. iii. Salt is now added to the water. (The added salt causes an increase in the density of the fluid.) Does the tension force on block A increase, decrease, or remain the same after the salt is added? Explain. MA - Mp =Mc