Table:
0
A
B
C
D
E
F
1
City
State or Territory
Station call sign
Network
Channel number
Programs Aired
2
Chicago
Illinois
WBBM-TV
CBS
2
Juke Box Jury Sheriff of Cochise
3
Los Angeles
California
KRCA-TV (now KNBC-TV )
NBC
4
Grand Jury
4
New York City
New York
WABC-TV
ABC
7
U.S. Marshal
5
New York City
New York
WCBS-TV
CBS
2
Man Without a Gun
6
New York City
New York
WNBC-TV
NBC
4
Grand Jury The Third Man

Questions and formulas:
Question: Which network was located in Illinois?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,B1="Illinois"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,B2:B6="Illinois"),4))
Level: medium
Question: What is the highest channel number?
Formula: MAX(E1)
Formula2: MAX(E2:E6)
Level: easy
Question: Which state or territory had a channel number of exactly 7?
Formula: LET(query1,SUMMARIZE(B1,SUMX(E1)),FILTER(query1,CHOOSECOLS(query1,2)=7))
Formula2: LET(query1,SUMMARIZE(B2:B6,SUMX(E2:E6)),FILTER(query1,CHOOSECOLS(query1,2)=7))
Level: hard