Sun-Li called her staff into her office and​ announced, "I'm thrilled to announce that​ we've been awarded the Cinocoh account.​ I'm here if you need​ me, but I want you to take this ball and run with it. You guys know what to do and how to do​ it, and I have complete faith in your judgment and​ abilities." According to the University of Iowa​ studies, what type of leadership style has​ Sun-Li exhibited?