how we got (v,u)from the table?

3.43 Using the tables for water, determine the specified property data at the indicated states. In each case, locate the state by hand on sketches of the pv and Tv diagrams. (a) At p=1.38 bar, T=204C, find v in m3/kg and u in kJ/kg. PROBLEM 3.43 Water is the substance. (a) P=1.38bar,T=204, Table A4 v=1.59kgm3u=2663.5kJkJ TABLE A-4 Properties of Superheated Water Vapor