Table:
0
A
B
C
D
E
F
1
Call sign
Frequency MHz
City of license
ERP W
Class
FCC info
2
WHRE
91.9
Eastville, Virginia
4,400
A
FCC
3
WHRG
88.5
Gloucester Point, Virginia
9,600
B1
FCC
4
WHRL
88.1
Emporia, Virginia
4,200
A
FCC
5
WHRX
90.1
Nassawadox, Virginia
46,000
B
FCC
6
W269BQ
101.7
Virginia Beach, Virginia
250
D
FCC

Questions and formulas:
Question: What is the call sign for a class of A?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,E1="a"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,E2:E6="a"),1))
Level: medium
Question: What is the average frequency MHz for license of eastville, virginia?
Formula: AVERAGEIFS(B1,C1,"eastville, virginia")
Formula2: AVERAGEIFS(B2:B6,C2:C6,"eastville, virginia")
Level: easy
Question: What is the average ERP W when the call sign is whre?
Formula: AVERAGEIFS(D1,A1,"whre")
Formula2: AVERAGEIFS(D2:D6,A2:A6,"whre")
Level: easy