Table:
0
A
B
C
D
E
1
Issued
Type
Design
Serial format
Serials issued
2
1973- 1974
Passenger
yellow on blue
AB-12-34
AA-00-00 to ZZ-99-99
3
1974
Passenger
yellow on blue
12-34-56
00-00-00 to unknown
4
1975- 1976
Passenger
black on yellow
ABC-123
unknown
5
1977- 1980
Passenger
black on yellow
ABC-123
unknown
6
1981
Passenger
black on yellow
ABC-123
unknown
7
1982
Passenger
black on yellow
ABC-123
unknown
8
1983- 1984
Passenger
black on yellow
ABC-123
EAA-000 to EZZ-999

Questions and formulas:
Question: What is the serials issued in 1982 with a format of ABC-123?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(D1="abc-123")*(A1=1982)),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,(D2:D8="abc-123")*(A2:A8=1982)),5))
Level: medium
Question: Which design has a serial format of AB-12-34?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,D1="ab-12-34"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,D2:D8="ab-12-34"),3))
Level: medium
Question: Which serials were issued with a design of black on yellow?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="black on yellow"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,C2:C8="black on yellow"),5))
Level: medium