Indicate the true statements about the active Schwartz plate:

1) is an active appliance;
2) by adding protrusion springs, the Schwartz plate becomes a mechanical-functional appliance;
3) in the plate, the centrally located Fischer screw is most often used, in the line of the first premolars;
4) the centrally located Fischer screw in the first molar line is most often used in the plate;
5) the pitch of the Fischer screw gives the widening of 1 mm;
6) patients are most often recommended to wear the device for at least 14 hours a day.
The correct answer is: