In a room, there are four people: Jinhai, Kehinde, Lior, and Makena. The room is square-shaped and has four high walls with no windows. In the center of the room, there's a large, rectangular table oriented north to south, creating a sort of barrier from view across its width. Jinhai is standing at the north end of the room facing south, with the table obstructing direct line of sight to the southern end. Kehinde is standing at the south end, also facing north, with the same lack of visibility due to the table. Lior is off to the east side, levitating in mid-air with a perfect vantage point of the entire room. Lastly, Makena is on the west side of the room, seated on a chair looking eastward, directly at the table's long edge, and consequently can't see Jinhai or Kehinde who are blocked by the width of the table.

Each corner of the room has a small, spherical orb that lights up at random intervals. Whenever an orb lights up, it emits a soft tone along with a subtle glow that can be seen by anyone who has a direct line of sight to the orb. At one instance, the orbs in the northeast and southwest corners light up simultaneously.

Considering the spatial setup of the room, the position, and the orientations of the people within it, who can see which orbs and what assumptions can they make about what the others see? Provide a short response.
Given the layout and positions of individuals within the room:

Jinhai, at the north end and facing south, will not be able to see the orb in the northeast corner because of the table obstructing the line of sight. However, Jinhai will see the light from the southwest corner orb, as there is a clear line of sight to that orb diagonally across the room.

Kehinde, at the south end facing north, will find the situation reversed. The table blocks the view of the southwest corner orb, but the northeast orb is visible to Kehinde, diagonally across the room.

Lior, levitating on the east side with a clear view of the entire room, will be able to see both orbs when they light up, as there is no obstruction to either the northeast or the southwest corners from this vantage point.

Makena, on the west side sitting and facing east, directly towards the table, has an obstructed view to both the northeast and southwest orbs by the width of the table and cannot see either orb light up.

As for reasoning about what they know regarding who can see the orbs:

Jinhai, seeing the southwest orb light up but not the northeast orb, can deduce that Kehinde, who is directly opposite, would likely see the northeast orb, given the symmetrical setup.

Kehinde, conversely seeing the northeast orb light up but not the southwest orb, could reason in a similar fashion that Jinhai would see the southwest orb.

Lior, with the full view of the room, can observe which orbs Jinhai and Kehinde can see based on their reactions. Lior also knows that Makena cannot see either orb because the table blocks Makena's line of sight.

Makena, not being able to see any orbs, can only guess based on the layout of the room and would not have definitive information about which orbs the others can see. However, given the positions and orientations of Jinhai and Kehinde, Makena may infer that they could each see one orb, based on the symmetry, but would not know which one without additional information.