Hi, so on my current project we have to analyse a push-pull amplifier but because of covid a lot of material was skipped and left for us to look up and i have no idea where to start. This is the current circuit and I'm not too sure what the resistors R2, R4 and R7 do or what the capacitor c1 is for. Any help explaining it or showing me somewhere i could find a good explanation would be greatly appreciated