Ethan can perform Role play situations in which he teaches Jamal to avoid cigarretes or alcoholo deal with he pressure.
Explanation:
First of all, Ethan could explain to him the bad effects of alcohol and cigarettes on the body. However, it won't be enough, because he could still say yes. Because knowing it will affect him negatively won't stop or decrease the pressures. He could teach him to endure the struggle and meditate, but we don't know if he can do it. But what we know he can do, is to practice his role model responsibility by role-playing situations to teach him to say no to alcohol and cigarettes