Table:
0
A
B
C
D
E
F
1
Track no.
Track
Original Artist
Soloist(s)
Vocal Percussionist
Arranger(s)
2
1
Does Your Mother Know
ABBA
Nick Barstow
Danny Swift
Alexei Kalveks
3
2
In My Head
Jason_Derülo
Ollie Stephenson, Chris Bland
Alexei Kalveks
Alexei Kalveks
4
3
Beautiful Day / Firework
U2 / Katy Perry
Dave Brennan, James Kay, Laurie Cottam
Alexei Kalveks and Dave Brennan
Nick Barstow
5
4
No Diggity
Blackstreet
Nick Fletcher, Selali Fiamanya, Dave Brennan
Samuel Swinnterton
Ben Woodgates
6
5
Mustang Sally
Wilson Pickett
Danny Swift
Ollie Stephenson
Ben Woodgates
7
6
She's Always A Woman
Billy Joel
Alexei Kalveks
unknown
Alexei Kalveks

Questions and formulas:
Question: What is the track whent the vocal percussionist is unknown?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,E1="unknown"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F7,E2:E7="unknown"),2))
Level: medium
Question: Who is the arranger when the vocal percussionist is Alexei Kalveks and Dave Brennan?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,E1="Alexei Kalveks and Dave Brennan"),6))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F7,E2:E7="Alexei Kalveks and Dave Brennan"),6))
Level: medium
Question: What is the original artist when the vocal percussionist is Alexei Kalveks?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,E1="Alexei Kalveks"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F7,E2:E7="Alexei Kalveks"),3))
Level: medium