how can I check the assumptions for Linear Mixed Models in SPSS?

I found those assumptions:

There are five fundamental assumptions of linear mixed-effects models:

1.Within-group errors are independent with mean zero and variance σ2.

2.Within-group errors are independent of the random effects.

3.The random effects are normally distributed with mean zero and covariance matrix.

4.The random effects are independent in different groups.

5.The covariance matrix does not depend on the group.

(Assumptions Linear Mixed-Effect Models (Crawley, 2013) Crawley, M. J. (2013). The R book. John Wiley & Sons.)