Fernanda earned her master's degree. She was excited about finishing graduate school and finding her first professional job. She obtained a position working in a large marketing department in a healthcare system in San Francisco. She was nervous about what would be expected of her. She was unsure about the rules in her own department and in the larger corporate culture of the organization. Who would likely be the most important socializing agent for Fernanda as she learns the appropriate behaviors in her new work environment?