Table:
text: Packed to the Rafters
DVD and Blu-ray releases
DVD and Blu-ray releases
DVD_Season Format _Episodes _Discs Region_4
The Complete Season 5 DVD 22 6 2May2013
The Complete Season 5 Blu-ray 22 6 N/A
The Complete Season 6 DVD 12 4 7November2013
The Complete Season 6 Blu-ray 12 4 N/A

text: Packed to the Rafters
DVD and Blu-ray releases
DVD and Blu-ray releases
DVD_Season Format _Episodes _Discs Region_4
The Complete Season 1 DVD 22 6 2December2009
The Complete Season 1 Blu-ray 22 6 N/A
The Complete Season 2 DVD 22 6 3November2010
The Complete Season 2 Blu-ray 22 6 3November2010
The Complete Season 3 DVD 22 6 20April2011
The Complete Season 3 Blu-ray 22 6 N/A
Season 4: Part 1 DVD 11 3 3November2011
Season 4: Part 1 Blu-ray 11 3 N/A
Season 4: Part 2 DVD 11 3 28March2012
Season 4: Part 2 Blu-ray 11 3 N/A
The Complete Season 4 DVD 22 6 28March2012
The Complete Season 4 Blu-ray 22 6 N/A

Question: What was the format of Packed to the Rafters for the 4 disc season less than 22 episodes and n/a for the Region 4 DVD and Blu-ray releases?