1. The problem statement, all variables and given/known data I need to find the gain. 2. Relevant equations 3. The attempt at a solution I know gain will be Vo/Vs. I originally tried to write different equations for each node, but I ended up with 5 eqns and 5 unknowns, and in the end it gave that vs=0V. Can someone give me an idea of what the first step(s) would be? Thanks.