I've attached a conbined circuit diagram to this post. I have to solve the circuit. I know that I have to simplify the diagram into a series circuit to make it easier to solve, but I'm having trouble with a few parts in the diagram. This is how I simplified so far: 1. I added R6 and R5 together using the series formula. I labeled it R8. 2. I added R4 and R8 together using the parallel formula. I labeled it R9. 3. I added R1, R2 and R3 together using the parallel formula. I labeled it R10. This is where I'm having difficulty. Do I add R7 and R9 (from step 2) together using the series formula or do I leave it the way it is.