Guillermo feels best when he is sitting in a japanese garden feeding the koi in the ponds. knowing what you know about arousal and motivation, at what level of arousal will guillermo most likely perform his best?

People generally perform at their best when they feel at their best. So Guillermo will generally perform at his best when the level of arousal is below average. This is a relatively sedentary activity, and is associated with calmness, so it is reasonable to conclude that Guillermo's arousal level is low during it. Therefore, Guillermo will perform at his best with a relatively low level of arousal.