User: Tell which of these musicians is a guitarist or a bassist:  Eddie Van Halen, Nikki Sixx, Steve Harris, Billy Sheehan, Steve Vai, Joe Satriani, Matthias Jabs, Jimmy Bain, Mick Mars, Vivian Campbell, Angus Young
Assistant: Eddie Van Halen - Guitarist
Nikki Sixx - Bassist
Steve Harris - Bassist
Billy Sheehan - Bassist
Steve Vai - Guitarist
Joe Satriani - Guitarist
Matthias Jabs - Guitarist
Jimmy Bain - Bassist
Mick Mars - Guitarist
Vivian Campbell - Guitarist
Angus Young - Guitarist