Edit the attached TOP-DOWN SITE PLAN image: draw STAGING MARKERS on it
at the exact normalized coordinates listed below. This is a planning
aid for a film crew, drawn over the plan.

HOW TO READ THE COORDINATES: x and y are fractions of the FULL canvas.
x runs left→right (x=0.25 lies a quarter of the way from the left
edge); y runs top→bottom (y=0.64 lies 64% of the way DOWN from the
top edge). Place every marker by measuring its fractional position on
the whole canvas. Do NOT snap a marker onto a nearby line, boundary,
path or landmark just because it is visually salient — if the
measured spot is plain open ground, the marker sits on plain open
ground.

Draw EXACTLY these markers, flat and high-contrast, small enough not
to hide the plan under them:
- CAMERA: one filled circle at the camera position, labelled CAM, with
  one straight thin sight line from that circle toward (and ending at)
  the look-target position.
- SUBJECTS: one filled circle per subject at its position, labelled
  with its slot code (E1, E2, ...).

Change NOTHING else: keep every zone, landmark, line, label and color
of the plan exactly as attached — do not redraw, recolor, move or
remove anything, do not add scenery, shadows or any other symbols or
text beyond the markers and labels specified above. The output is the
SAME plan image with only these staging markers added.