[Freesurfer] Confused with Coordinate System in FS

Hi all: I am confused with coordinate systems in FS. I have several questions bellow. 1. when we run recon-all -s subjid -all, Is the individual native space transformed to talairach coordinate system?. when run recon-all -s subjid -qcache, does the talairach system go into MNI system (fsaverage space)? 2. what is the tranformation matrix within the file of <subjid>/mri/transforms/talairach.xfm?, what is it used for? 3. Does the coordinates within .label files under <subjid>/label/ belong to the MNI coordinate system? 4. In TkSurfer Tool, does the coordinate of "Vertex RAS" belong to MNI coordinate? Hope someone gives me suggestions.

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