Table:
0
A
B
C
D
E
1
DVD Season
Format
# Episodes
# Disc(s)
Region 4
2
The Complete Season 1
DVD
22
6
2December2009
3
The Complete Season 1
Blu-ray
22
6
N/A
4
The Complete Season 2
DVD
22
6
3November2010
5
The Complete Season 2
Blu-ray
22
6
3November2010
6
The Complete Season 3
DVD
22
6
20April2011
7
The Complete Season 3
Blu-ray
22
6
N/A
8
Season 4: Part 1
DVD
11
3
3November2011
9
Season 4: Part 1
Blu-ray
11
3
N/A
10
Season 4: Part 2
DVD
11
3
28March2012
11
Season 4: Part 2
Blu-ray
11
3
N/A
12
The Complete Season 4
DVD
22
6
28March2012
13
The Complete Season 4
Blu-ray
22
6
N/A
14
The Complete Season 5
DVD
22
6
2May2013
15
The Complete Season 5
Blu-ray
22
6
N/A
16
The Complete Season 6
DVD
12
4
7November2013
17
The Complete Season 6
Blu-ray
12
4
N/A

Questions and formulas:
Question: What was the format for the 4 disc season that had less than 22 episodes and n/a for region 4?
Formula: LET(query1,LET(query1,FILTER(A1:E1,E1="n/a"),SUMMARIZE(CHOOSECOLS(query1,2),SUMX(CHOOSECOLS(query1,3)),SUMX(CHOOSECOLS(query1,4)))),FILTER(query1,(CHOOSECOLS(query1,2)<22)*(CHOOSECOLS(query1,3)=4)))
Formula2: LET(query1,LET(query1,FILTER(A2:E17,E2:E17="n/a"),SUMMARIZE(CHOOSECOLS(query1,2),SUMX(CHOOSECOLS(query1,3)),SUMX(CHOOSECOLS(query1,4)))),FILTER(query1,(CHOOSECOLS(query1,2)<22)*(CHOOSECOLS(query1,3)=4)))
Level: hard