How to install Prerequisites before installation of a msi?? Can have a complete example for the beginners in WIX

Question

I need some prerequisites to be installed before my product installation:

1. .NET Framework 4.0
2. SQL Express
3. Microsoft Report Viewer
4. RGQ Export

I do have all these Prerequisites in a folder in Solution but When I mention these in File-source then it just copy all the Prerequisites in program file folder, but I need to install these after license agreement dialog.