panel data tests?

[ahmed slamah]

Hi every body :D
Using the amazing eveiws program I do regression model for panel data by eveiws 7, the data are attached. 55 company from 2002 to 2006.
Please, I have the following 4 questions:
1- How I exclude the extreme values (outliers) and replace it with the value under it (values within the range)
2- How can I test for each company alone (time series) and every year alone (cross section)
3- Are the following tests available for panel data model: (if available, please tell me how to perform it)
a- Normality.
b- Linearity of the model.
c- Heteroscedasticity
d- Multicollinearity
4- What are the right table that I should use to compare with durbin Watson value.
Finally, I appreciate your help