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

PLACEMENT AUTHORITY: each marker line below places its marker relative
to a fixed feature, zone or boundary VISIBLE on the attached plan —
that landmark-relative description is the placement authority. The
normalized fractions in parentheses are coarse estimates of the same
spot (x runs left→right 0..1, y runs top→bottom 0..1 of the full
canvas) — use them only to confirm the rough region; when in doubt,
the landmark description wins. Do NOT relocate a marker onto a
different salient line or feature than the one its description names.

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.