Answer:
Based on SLII, the leadership style you should exhibit in this case is:
Directing.
Step-by-step explanation:
Directing as a leadership style should not be done in total isolation of the other leadership styles. While the junior member can be delegated to handle the organization of the PowerPoint presentation, there is need to initially direct, coach, and support this member to ensure that group objectives are attained.
Directing ensures that this junior member is properly instructed and supervised.
Coaching ensures that the junior member, having shown some level of competence, is fully engaged to develop all the required skill-set.
Supporting enhances the competence level of the junior group member. This can be achieved through the active participation of the leader in the junior's assignments.
Delegating ensures that the ultimate leadership goal is attained, and this happens when the junior's competence cannot be questioned.