Annette is part of the nursing staff in St. Joseph's emergency room. Her coworkers often look to her for guidance when assisting patients because of her high clinical competencies. Annette has become a/an ______.
The CEO of Demix, Chris, is absent or not engaged with day-to-day activities. Out of the two department heads, Giselle and Bryton, Giselle takes on the responsibilities of leading the two groups. What concept does this represent?