How to get the transferfuntion through Simulink?

Hi dear all,

    I have finished my block in the Simulink, Its a complicated feedback system.

My questions are:

    1.How can I get the transferfunction through the Simulink?

    2.Can Simulink help me on the stability analysis?

Thanks a lot~~~

[Azzi Abdelmalek]

What do you mean by your first question?