Table:
0
A
B
C
D
E
1
Territory
Broadcaster
Channel
Launched
Closed
2
Brunei
Kristal-Astro
144
December 10, 2011
now
3
Malaysia
Astro
144
December 10, 2011
now
4
Malaysia
UniFi
112
September 1, 2008
now
5
Singapore
StarHub TV
122
April 17, 2008
December 7,2013
6
Sinagpore
mio TV
694
September 15,2013
now

Questions and formulas:
Question: Which territory has a channel of 144 and a broadcaster of Astro?
Formula: LET(query1,LET(query1,FILTER(A1:E1,B1="astro"),SUMMARIZE(CHOOSECOLS(query1,1),SUMX(CHOOSECOLS(query1,3)))),FILTER(query1,CHOOSECOLS(query1,2)=144))
Formula2: LET(query1,LET(query1,FILTER(A2:E6,B2:B6="astro"),SUMMARIZE(CHOOSECOLS(query1,1),SUMX(CHOOSECOLS(query1,3)))),FILTER(query1,CHOOSECOLS(query1,2)=144))
Level: hard