FAA Regulation

Civil and public aircraft operations. Public and military operations. Civil operations. 

Not compliant with Part 107. Part 107 does not apply to this scenario. Compliant with Part 107. 

The remote pilot must contact the Air Traffic Control (ATC) facility after launching the unmanned aircraft. The remote pilot must monitor the Air Traffic Control (ATC) frequency from launch to recovery. The remote pilot must have prior authorization from the ...

Compliant with Part 107 when used with a first-person view (FPV) camera system. Not compliant with Part 107. Compliant with Part 107.

Denial of application for Remote Pilot, waivers, or suspension/revocation, or a civil penalty.  Jail time of up to 1 year A required checkride with the FAA

They can maintain line of sight and without loss of control.  They briefed each other before the flight. They are in radio contact the entire time.

Person manipulating the controls.  Visual observer. Remote Pilot in Command (Remote PIC).

Yes, as long as it meets Remote ID requirements. No, it is not permitted.  Yes, it is permitted without limitations.