FAA Regulation

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

Continue the mission, airplanes are not allowed to fly lower than 500 feet AGL unless around an airport. Give way and stay clear from the crop duster.   Continue the mission, ...

No, the other people in the park are not on notice.  Yes, as long as the park is not busy enough that it would be considered an open-air assembly of human beings.

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

November 28th. November 11th.  October 28th.

Without the possibility of direct human intervention from within or on the aircraft.  For hobby and recreational use when not certificated. During search and rescue operations other than public.

No Medical Certificates are required. A Class 3 Medical Certificate A Class 2 Medical Certificate.

Flying in a prohibited area. Flying without Remote ID. Flying in class B airspace without ADSB-Out.

Only when visual observers participate in the operation. Alone, if operating during daylight hours. Under the direct supervision of a Remote PIC.  

No, the required visibility is 5 statute miles. Yes, as long as you remain 500 feet below clouds and 2000 feet horizontally away from them. Yes, as long as I remain ...