The middle gal has a couple leaf miner tracks.
They're a minor annoyance.

It's hard to see the small spots.
Get a good 30 -60X glass and/or post some close-ups.
If those spots show that they are eaten in, you may have thrips.
If they are simply discolorations and the leaf surface is level, we'll need some macro shots to diagnose.

Aloha,
Weezard