Urgent, urg

Watch the following YouTube interview with mathematician and Nobel prize winner John Nash Jr. and his son, both diagnosed with schizophrenia.  Answer the questions below regarding John Nash Jr.'s son. 

• Considering the history provided and what you can observe in the video, what symptoms of schizophrenia, positive and negative, does Johnny Nash have? 
• What medications would be prescribed for Johnny Nash, and why?
• Discuss the etiology of schizophrenia.  How does it apply to John and Johnny Nash's case? 

(The video is on youtube i cannot copy. Thanks)