Table:
0
A
B
C
D
E
1
Channel
Center Frequency
Frequency delta
Channel Width
Overlaps Channels
2
1
2.412 GHz
5 MHz
2.401–2.423GHz
2-5
3
2
2.417 GHz
5 MHz
2.406–2.428GHz
1,3-6
4
3
2.422 GHz
5 MHz
2.411–2.433GHz
1-2,4-7
5
4
2.427 GHz
5 MHz
2.416–2.438GHz
1-3,5-8
6
5
2.432 GHz
5 MHz
2.421–2.443GHz
1-4,6-9
7
6
2.437 GHz
5 MHz
2.426–2.448GHz
2-5,7-10
8
7
2.442 GHz
5 MHz
2.431–2.453GHz
3-6,8-11
9
8
2.447 GHz
5 MHz
2.436–2.458GHz
4-7,9-12
10
9
2.452 GHz
5 MHz
2.441–2.463GHz
5-8,10-13
11
10
2.457 GHz
5 MHz
2.446–2.468GHz
6-9,11-13
12
11
2.462 GHz
5 MHz
2.451–2.473GHz
7-10,12-13
13
12
2.467 GHz
5 MHz
2.456–2.478GHz
8-11,13-14
14
13
2.472 GHz
5 MHz
2.461–2.483GHz
9-12, 14

Questions and formulas:
Question: what is the channel width that overlaps channels 1,3-6?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="1,3-6"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E14,E2:E14="1,3-6"),4))
Level: medium