Simplify the following text for a Grade 8 native English-speaking person.
Original: Alan John Carpenter ( born 4 January 1957 ) was the 28th Premier of Western Australia from 26 January 2006 to 23 September 2008 .
Simplified: Alan John Carpenter ( born 4 January 1957 ) is a former Australian politician . He was the 28th Premier of Western Australia , serving from 2006 to 2008 .