Finally, we define functions that will use these newly calculated coefficients to find
  1.  the resistance \(R\) from the temperature \(T\) and magnetic field \(B\)
  2.  the temperature \(T\) from the resistance \(R\) and the magnetic field \(B\)
The function RandBtoTcalculates the temperature corresponding to a particular resistance value R when measured in a magnetic field of strength B.