Table:
0
A
B
C
D
E
1
Entities
Country
Supply point
Voltage (kV)
Power (MW)
2
FURNAS, ELECTROSUL, ELECTROBRAS
Brazil
Itaipu
500
7000
3
EBISA
Argentina
Yacyretá
500
1540
4
ENERSUL
Brazil
Pedro Juan Caballero
23
3
5
COPEL
Brazil
Acaray
132
50
6
EMSA
Argentina
C.A. López
132
30

Questions and formulas:
Question: What are all the countries where the electric company Ebisa has a presence?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="EBISA"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,A2:A6="EBISA"),2))
Level: medium
Question: In how many countries is Itaipu a supply point for electricity?
Formula: ROWS(UNIQUE(FILTER(B1, C1="Itaipu")))
Formula2: ROWS(UNIQUE(FILTER(B2:B6, C2:C6="Itaipu")))
Level: medium
Question: What are the electric companies drawing power from Itaipu?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="Itaipu"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,C2:C6="Itaipu"),1))
Level: medium