BOB is a 16 year old male who has terminal brain cancer. He has

BOB is a 16 year old male who has terminal brain cancer. He has asked for his life to end via euthanasia. Would this be ethical or not based on Cost-Benefit Analysis and The Calculus of Felicity. *Note I did not assign him a specific country of origin. 
You must name each theory and the person/persons who gave us the theory. (Duty Theory and Calculus of Felicity) 
You must explain each theory in your own words. 
You must use BOB’s case as your example.
Show BOTH ethical theories through the perspective of BOB, the doctor and society. 
What would the final verdict be in each theory: ethical or not and WHY!!! or WHY NOT!!!