analysis of two stage preampplifier
Start by recognizing that if Q1 is cut off, R1 is the sole source of base current for Q2. In order to establish equilibrium, the voltage across R7 must rise to the point where Q1 starts to conduct and divert some of that base current away. This establishes a minimum current through R7.

There is also a maximum current through R7 established by the series connection of R8, R5, R6 and R7 (assuming Q2 is saturated). It's probably safe to assume that the quiescent point for Q2 is somewhere close to the midpoint of these two current values.

The current through R6 + R7 determines the emitter voltage of Q2, which also establishes the base voltage of Q2 and the collector voltage of Q1.

This gives us the collector current of Q1.

The collector current of Q1, along with R4, determine the maximum current through R3. There's also a small contribution of the base current through R2.

Are these hints enough to get you started?