The psychological problems of elderly persons may be divided into two groups. one group consists of disorders that may be common among people in all age groups but are often connected to the process of aging when they occur in an elderly person. these include

Depression, anxiety and substance-related disorder.

Explanation:

Many elderly people can develop substance use problems or mental disorders, such as depression and anxiety.  The might suffer life stressors that are familiar to everyone, but they add up to stressors common to those in later life, like the meaningful continuous decline in their abilities. Moreover, aging people might endure different conditions at once.

what are you saying?

i only have part a but here is the first one: - lewis and clark are born

- lewis marries sacajawea and clark is jealous  

- clark drowns lewis and then goes to jail