4 panels and 3 tiers.

Tier 1: panels 1+2.
Tier 2: panel 3.
Tier 3: panel 4.

4-21.1 Mid shot low angle from mostly a profile, the camera a little bit more behind Lan. Jane holds her bag strap and looks at Lan kind of incredulously, still blushing.
JANE: That's a really kind offer. I'll try to do the same for you.

4-21.2 Closeup on Lan winking cheekily and smiling big. The sun is out behind her.
LAN: Thanks, Jane! We all have to lean on each other.

4-21.3 Lan turns away from Jane and holds her spray bottle up to a hanging plant, looking back over her shoulder.
LAN: The world can only get better if we all help out.

4-21.4 Jane stands at the bus stop, looking off into the distance over her shoulder. Around her are rain puddles reflecting the blue sky above her. Aerial shot.