Simplify the following text for a Grade 7 native English-speaking person.
Original: Angus McKinnon Young ( born 31 March 1955 ) is a Scottish-born Australian musician , and the lead guitarist , songwriter , and co-founder of the rock and roll band AC\/DC .
Simplified: Angus McKinnon Young ( born on 31 March 1955 ) is a Scottish-born Australian guitarist and songwriter . He is one of the founders of the Australian hard rock band AC\/DC .