Web service and method for getting task schedule and assignment details

Hi,

I am trying to create a webpart with below data in project server 2010,

1. Tasks in a project
2. Start Date
3. End date
4. Baseline Start
5. Baseline Finish
6. Start Variance
7. Finish Variance
8. Resource Names

Which webservice and method can be used to get these data?

Please help..

Thanks, Lovely