sql server r2 user database directory

Question

The network administrator setup a test instance of sql server 2008 r2 standard edition for me to work.I have little experience with sql server administration and deploying a small C#.net 2010 web application. Due to this fact, I have the following questions:

1. Can you tell me how I can find where the "user database directory" and "Temp DB Log directory" are located?

2. Can you tell me how to change the location of where the "user database directory" and "Temp DB Log directory" are located at?