Welcome to cann.com bob and congrats on getting some pretty good looking plants!

The last pic looks like it needs a bit more nitrogen to me, but the others i'm really not sure about and it makes it harder to diagnose a problem as you've only just got them and don't know exactly what they've been getting fed.

Can i suggest you put this question in the plant problems section, you'll probably get more responses as it might not get noticed in here, there's some charts and info there, a form too if you can answer as much of it as you know, it helps everyone get a better understanding of the plants environment so they can give you a better answer. I'm sure one of the experts will be along to help soon.

Good luck!