CREATE TABLE table_10592536_8 (date_of_vacancy VARCHAR(255), date_of_appointment VARCHAR(255), replaced_by VARCHAR(255))
What is the date of vacancy when the date of appointment is 28 november 2007 and replaced by is alex mcleish?
    
SQL: SELECT date_of_vacancy FROM table_10592536_8 WHERE date_of_appointment = "28 November 2007" AND replaced_by = "Alex McLeish"