You didn't close off Q3 with a semi-colon. Please see your statement below:
Q3="SYSTEM /usr/bin/mysqldump -u root --master-data=1 --opt ssc > /var/opt/backup.sql"
should be
Q3="SYSTEM /usr/bin/mysqldump -u root --master-data=1 --opt ssc > /var/opt/backup.sql;"