Properties of water/steam - one interesting Mathcad-sheet

Why this sheet interesting!?

1. I have used the rnd function for the generating a reverse function

2. The vector of this sheet has values with different dimentions - pressure and temperature. We can do Vec:=Find(p, t)=... only in Mathcad Prime. We must do Vec:=Find(p, t)     Vec[0=...MPa Vec[1=...°C for the finding of the Gibbs point (?)

3...N... Point me please