Termodynamik - isoleret system og protein model

Jeg har brug for hjælp til disse to opgaver. Til opgave 1 hører der et vedhæftede billede med:

1)  Here is a slightly more complicated protein model with three macrostates: a folded state (F), and intermediate state (I), and an unfolded state (U). (se vedhæftede billede). What is the melting point (i.e. the temperature at which the fraction of F ( fF ) = 0.5) for this polymer if the standard enthalpy of I and U are 2.5 and 5.0 kJ/mol higher than F, respectively?

2)  Two isolated systems A and B each have internal energies of 2 energy units. System A has 10 particles and system B has 4 particles. If we allow energy transfer between the two systems - what are the values of UA and UB after equilibrium?