1 -+ 1 cm 4 Unknown liquid 4 cm water 2 3 (a) Rank the pressure at points 1 to 5 from largest to smallest. O P2 > P3 > PA > P1 = Ps O P2 = P3 > P1 = PA > P5 O P2 = P3 > PA > P1 = Ps O P2 > P3 > PA = P1 > P5 O None of the above / not enough information (b) The density of the unknown liquid is the density of water. O smaller than O larger than the same as (c) Find the density of the unknown liquid if the distance from 1 to 2 is 4.0 cm, and the distance from 5 to 4 is 1.0 cm. kg/m3