There would be conman there. This is because when listing items you place a comma between each item to separate them as separate but part of the same idea.
The chart attached has some of the comma rules, rule 1 is the rule you are looking for. If you need more help I recommend looking at Khan Academy, it’s a free online website with short videos and practices, I would take five min to just check it out. You won’t regret it.
Hope this helps! Please make me the brainliest, it’s not necessary but appreciated, I put a lot of effort and research into my answers. Have a good day, stay safe and stay healthy.