Exit reports,top common path,errors shown to users broken down by logged in and logged out

Hi Experts,

In the scenario ,we are storing error name in evar . Can anyone suggest me how can I  get the reports of the following questions.

1.What are the top common paths after error page?

2.What are the chances of Error being shown to users - broken down by Overall, Logged-in, Non-Logged in?

3.How many exits happening on error page happen during booking journey?

Thanks