Using previous numerical values,4. (a) From Activity Manual: The pictured Utube is open to the atmosphere at both ends. Assume that the mystery fluid does not mix with the mercury. Let p0 represent atmospheric pressure, Hg represent the density of mercury, and f represent the density of the mystery fluid. (a) Obtain an algebraic expression for the density of the mystery fluid in terms of some or all of the following: h1, h2, h3, and Hg. Hint: pressures at 1 and 2 must be samedetermine the gauge pressure at Point A. Take atmospheric pressure to be p0 = 101,300 Pa