ECG/EKG values

1 small square is equal to ____________________ . ____________________ seconds
1 Large square is equal to ____________________ . ____________________ seconds
5 Large squares is equal to ____________________ . ____________________ seconds
QRS complex range is ____________________ . ____________________ to ____________________ . ____________________ seconds
PR interval range is ____________________ . ____________________ to ____________________ . ____________________ seconds
QT interval range is ____________________ . ____________________ to ____________________ . ____________________ second s