How co-occurring disorders such as Alcohol and depression develop?

Select and research two commonly co-occuring disorders. Example: Alcohol and deppression, Marijuana and schizophrenia, borderline personality disorder and cocaine or you can come up with your own topic. Your essay should address 1. How these co-occurring disorders develop, 2. Their impact 3. which is likely to come first and their interrelationship(very important) 4. How they are best managed. References to be used should be recent between (2014-2019) and at least 10 of the best available evidence identified through a search of the literature.