How can I replace the spark plugs on an Audi 80?

I recently bought a used Audi 80 and I noticed that it is not running as smoothly as it used to. I suspect that the spark plugs may need to be replaced. Can anyone provide me with step-by-step instructions on how to do this properly?

To replace the spark plugs on an Audi 80, start by gathering all the necessary tools and parts. Then, locate the spark plugs, usually found on the top of the engine. Using a spark plug socket and ratchet, carefully remove the old spark plug and replace it with a new one. Repeat for all the other spark plugs. Remember to use a torque wrench to ensure that each spark plug is tightened to the correct torque.