Which statements are true regarding the framework of delegation related to the Hersey's Situational Leadership Model? Select all that apply. One, some, or all responses may be correct.

A single factor influences the effectiveness of a leader.

Ability relates to the individual's attitude and commitment.

Willingness relates to the individual's attitude towards the task.

Ability to diagnose performance is a core competency of a situational leader.

Willingness is the sole factor that must be assessed to determine the readiness of the follower.