It requires very complicated calculations If you want to calculate it yourself, but I don't think what you want is that. What I suggest you is that you use a CAD software such as PSpice or Proteus (even Matlab if you are familiar with Simulink), assemble your circuit there and define some initial values for your circuit. Then find the correct combination trying and failing. This is the practical method.
Another method is that you can find the transfer function of the system with the variables C26, C27, C28 etc. and then use an iterative numerical method to solve the system for these parameters. You have two separate outputs, thus the calculation would not be that difficult. You can calculate them separately.
Final note: You probably will not be able to get a specific answer from here because of the complexity and the effort that requires to solve the problem.