Final answer:
According to Hersey & Blanchard's Situational Theory of Leadership, Jim should guide Bob and show him how to be a more skilled worker.
Step-by-step explanation:
According to Hersey & Blanchard's Situational Theory of Leadership, Jim should guide Bob and show him how to be a more skilled worker. This approach is known as the coaching style of leadership. Since Bob is knowledgeable but lacks motivation, Jim can provide guidance and support to help Bob develop the necessary skills and increase his motivation. By taking on a coaching role, Jim can help Bob grow and become more successful in his new position.