How do I change the spark plugs in an Audi 80?

I've been having trouble starting my Audi 80 and I suspect it's time to change the spark plugs. Can someone guide me through the process step by step? I have basic knowledge about cars but I've never changed spark plugs before.

First, gather all the necessary tools such as a spark plug socket, ratchet, and gap gauge. Start by removing the spark plug wires carefully. Then, take out the old spark plugs using the socket and ratchet. Use the gap gauge to check the gap on the new spark plugs and adjust if needed. Finally, install the new spark plugs and reattach the wires in the correct order.