Send sales forecast charts and answer Q&A on WhatsApp with OpenAI

How It Works Top Branch Workflow 1. The Data Scientist: Ingest: Pulls historical sales data from Google Sheets. Math Engine: Runs 7 statistical algorithms (e.g., Seasonal Naive, Linear Trend, Regression). It backtests them against your history and scientifically selects the winner with the lowest error rate. 2. The Data Analyst: Interpret: The AI Agent takes the mathematical output and translates it into business insights, assigning confidence scores based on error margins. Report: Generates a visual trend chart (PNG) and sends a complete briefing to your phone. Bottom Branch Workflow 3. The Consultant: AI Agent 2 handles the follow-up questions. It pulls the latest analysis context and chec

Help me set up the n8n workflow "Send sales forecast charts and answer Q&A on WhatsApp with OpenAI" (https://n8n.io/workflows/12289). It uses: Google Sheets, HTTP Request, WhatsApp Business Cloud, Code, AI Agent, OpenAI Chat Model, Simple Memory, Structured Output Parser. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.