Please help to answer these multiple-choice questions. It is related to AR and VR

1.3D tracking cannot be computed without explicit markers.

True

False

2.In Outside-In tracking, cameras are worn by the user.

True

False

3.ARToolkit is a free OpenSource piece of software dedicated to Augmented Reality (AR).

True

False

4.The Hololens device is an Augmented Reality optical see-through headset.

True

False