Run quizzes over WhatsApp and rank results automatically

flowchart TD trig>"participant starts quiz"]:::trig s0["Present next question"]:::task s1(("Record participant answer")):::human s2["Check if questions remain"]:::task s3["Calculate final score"]:::task s4[("Store result and show ranking")]:::store trig --> s0 s0 --> s1 s1 --> s2 s3 --> s4 lp{"all questions answered"}:::gate s2 --> lp lp -. "more questions remain" .-> s0 lp -->|"finished"| s3 out[/"scored and ranked quiz result"/]:::out pay{{"automated grading without manual admin"}}:::pay s4 --> out out --> pay classDef task fill:#e7f6fe,stroke:#34b8f0,color:#2c2a29 classDef svc fill:#f6f8fa,stroke:#7c8795,color:#2c2a29 classDef mi fill:#e7f6fe,stroke:#0079a8,color:#2c2a29,stroke-width:2px classDef human fill:#fff,stroke:#0079a8,color:#0079a8 classDef store fill:#f6f8fa,stroke:#0079a8,color:#2c2a29 classDef trig fill:#00a4eb,stroke:#0079a8,color:#fff,font-weight:bold classDef trigtime fill:#00a4eb,stroke:#0079a8,color:#fff,font-weight:bold classDef trigdata fill:#8ad4f5,stroke:#0079a8,color:#06314c,font-weight:bold classDef gate fill:#fff,stroke:#e8a23d,color:#6b4708,font-weight:bold classDef out fill:#1f9d6b,stroke:#167a53,color:#fff,font-weight:bold classDef pay fill:#06314c,stroke:#021f33,color:#fff