Human body detection not motion

The project consists of designing a prototype, to monitor human body (not objects/pets) presence using sensors or other means within the proximity for continuously 3-5 min (should have the option to increase /decrease time) then output a code. Proximity can be 1 meter/ 2 meter / 3 meters (should have option to increase /decrease distance). If the human is moved outside the proximity then it should give a different code/output. It should have a logic to differentiate between the human body, pets and other nonliving objects and only monitor the human body. The project should be as simple as possible and the device should cover a wider angle possible. Possible fusion of sensors. You should deliver a PCB design with connections incl. the connection-diagram, all devices used, all documentation, and all source codes.