Table:
0
A
B
C
D
E
1
Channel
Channel name
Callsign
Signal power
Broadcast area
2
1
NHK General TV / NHK G (GTV)
JOAK-DTV
10kW
Greater Tokyo
3
2
NHK Educational TV / NHK E (ETV)
JOAB-DTV
10kW
All Kantō
4
4
Nippon Television / Nittele (NTV)
JOAX-DTV
10kW
All Kantō
5
5
TV Asahi / Tele-Asa (EX)
JOEX-DTV
10kW
All Kantō
6
6
TBS
JORX-DTV
10kW
All Kantō
7
7
TV Tokyo / Teleto (TX)
JOTX-DTV
10kW
All Kantō
8
8
Fuji Television (CX)
JOCX-DTV
10kW
All Kantō

Questions and formulas:
Question: What is the broadcast are for channel 1?
Formula: LET(query1,SUMMARIZE(E1,SUMX(A1)),FILTER(query1,CHOOSECOLS(query1,2)=1))
Formula2: LET(query1,SUMMARIZE(E2:E8,SUMX(A2:A8)),FILTER(query1,CHOOSECOLS(query1,2)=1))
Level: hard
Question: What is the call sign for channel 6?
Formula: LET(query1,SUMMARIZE(C1,SUMX(A1)),FILTER(query1,CHOOSECOLS(query1,2)=6))
Formula2: LET(query1,SUMMARIZE(C2:C8,SUMX(A2:A8)),FILTER(query1,CHOOSECOLS(query1,2)=6))
Level: hard
Question: What is the channel number for TBS?
Formula: SUMIFS(A1,B1,"TBS")
Formula2: SUMIFS(A2:A8,B2:B8,"TBS")
Level: easy
Question: How many channels are there in the Greater Tokyo area?
Formula: SUMIFS(A1,E1,"Greater Tokyo")
Formula2: SUMIFS(A2:A8,E2:E8,"Greater Tokyo")
Level: easy
Question: What is the signal power for JOAB-DTV?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="JOAB-DTV"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,C2:C8="JOAB-DTV"),4))
Level: medium