please help me with this physical chem problem

hi people. i'm taking the physical chem class and my professor is the
worst ever. he can hardly stand on his feet and he never explains
anything. he gave us a homework problem and i've been struggling for
quite some nights trying to solve it. Enough lamenting, here it is:

given Fx=-K1X Fy=-K2Y Fz=-K3Z Nx particles, Ny particles, Nz
particles.

1. Calculate the partition function
2. Calculate <E>
3. Calculate Cv
4. Discuss physical interpretations

that was it. i'd be very pleased and thankful if i recieve an answer.