“Kung Fu Panda 3,” from DreamWorks, marks the third installment of the adventures of Po, an amiable and witty animated panda bear who, somewhat against his own nature, becomes a martial-arts expert and helps to defend his Chinese village from evil. The film’s two directors, Jennifer Yuh Nelson and Alessandro Carloni, sat down in Seattle to take some questions. “Kung Fu Panda 3” movie still courtesy of DreamWorks Animation