CREATE TABLE table_name_98 (roll VARCHAR(255), area VARCHAR(255), decile VARCHAR(255), authority VARCHAR(255))
What is the total roll with a decile less than 7, and an authority of state, in the Macraes Flat area?
    
SQL: SELECT COUNT(roll) FROM table_name_98 WHERE decile = 7 AND authority = "state" AND area = "macraes flat"