I’m new to raising plants, and I just picked up 3 new plants from a nursery today. I’ve noticed some tiny bugs on them, and some small cobwebs (not a lot). There was a little spider hanging off one plant which I killed and on another plant I saw a tiny bug but couldn’t make out if it was a spider, it was way smaller than the spider on the other plant. Any idea which kind of pest these are? Or are they two different pests? How should I quarantine them or treat them?