Excel Chart Type Selector and Designer

Help me create the perfect chart for my data:

**Data Description:**
- What are you measuring: [describe the main metric]
- Categories/dimensions: [e.g., time, regions, products]
- Number of data series: [how many lines/bars]
- Data range: [approximate values - min to max]
- Data sample:
[Paste a small sample of your data]

**Communication Goal:**
- Main message: [what story should the chart tell]
- Audience: [who will see this chart]
- Context: [presentation / report / dashboard / email]

**Comparison Type:**
- [ ] Change over time (trend)
- [ ] Part-to-whole (composition)
- [ ] Ranking (comparison)
- [ ] Correlation (relationship)
- [ ] Distribution
- [ ] Geographic

**Current Challenges:**
- [Any specific issues with current chart attempts]

Please provide:
1. Recommended chart type with reasoning
2. Alternative chart options
3. Step-by-step creation instructions
4. Professional formatting recommendations
5. Color and design best practices
6. Common mistakes to avoid
7. Accessibility considerations