Do not expect an answer to those crash reports.
In your applications folder you should have a utilities folder. Look for an app called console.
This will allow you to look at the logs for the crashing applications.
I think if you look in the ~/Library/Logs section, then Crash Reporter, you should be able to get more info about the nature of the crash.
If you post the most recent crashs (the logs can be quite long though you have only be up for a few days so maybe not)...