Read the attached case study and then write a 3 page minimum essay in APA format, using 3 scholarly sources (peer-reviewed journal articles) and a minimum of five in-text citations. You must answer these questions in your essay.1. If you had been called by Lincoln’s president to help resolve the problems described in the case, how would you have carried out the contracting and diagnosis stages? What would you have done differently than what the OD consultant did?2. Is third-party intervention an appropriate intervention in this case? Other possible OD interventions?3. How effective was the third-party intervention? Next Steps?