This year’s Chain Store Age “10 Under 40” youthful overachievers — selected by nationwide search and nominations by colleagues — are intense, collaborative team-builders. Each talks about seeing, understanding and responding to the big picture — the whole forest. No one shies away from problems. They seek out big, creative challenges and work tirelessly until solutions emerge.This year’s group supports the broader industry, too. They are International Council of Shopping Center members, nationally and localy.