Simplify the following text for a Grade 5 native English-speaking person.
Original: Guy Rupert Berryman ( 12 April 1978 , in Kirkcaldy , Scotland ) is a Scottish musician best known as the bassist for the groups Coldplay and Apparatjik .
Simplified: Guy Rupert Berryman ( born 12 April 1978 ) is a Scottish guitarist . He is a member of the rock band Coldplay .