Table:
0
A
B
C
D
E
1
Territory
Broadcaster
Channel
Launched
Closed
2
Brunei
Kristal-Astro
121
August 31, 2006
February 1, 2010
3
Indonesia
Astro Nusantara
40
June 15, 2006
October 20, 2008
4
Malaysia
Astro
121
August 31, 2006
February 1, 2010
5
Singapore
StarHub TV
83
January 1, 2005
March 31, 2007
6
Singapore
mio TV
35
April 1, 2007
October 1, 2012

Questions and formulas:
Question: When did channel 83 in singapore launch?
Formula: LET(query1,LET(query1,FILTER(A1:E1,A1="singapore"),SUMMARIZE(CHOOSECOLS(query1,4),SUMX(CHOOSECOLS(query1,3)))),FILTER(query1,CHOOSECOLS(query1,2)=83))
Formula2: LET(query1,LET(query1,FILTER(A2:E6,A2:A6="singapore"),SUMMARIZE(CHOOSECOLS(query1,4),SUMX(CHOOSECOLS(query1,3)))),FILTER(query1,CHOOSECOLS(query1,2)=83))
Level: hard
Question: Where is channel 83 broadcasted?
Formula: LET(query1,SUMMARIZE(A1,SUMX(C1)),FILTER(query1,CHOOSECOLS(query1,2)=83))
Formula2: LET(query1,SUMMARIZE(A2:A6,SUMX(C2:C6)),FILTER(query1,CHOOSECOLS(query1,2)=83))
Level: hard
Question: Who broadcasts in malaysia?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="malaysia"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,A2:A6="malaysia"),2))
Level: medium