ok thanks. i will be setting R1 and R2 to be 10k each and R4 to be 1k. If I would the collector voltage to be at 2.5V, and I would still like the collector current to be 1mA, R3 should be set at 3.5k, which is more than the original 3k. If I would set it to be lower, then I should set the collector current to be lower, what value would you suggest the collector current to be and why? Also, the gain of the transistor originally was -30 while the new gain would be lesser, at most -3 when R3 is 3k and R4 is 1k. why would i need to lower the gain?