# RE8 | perplexity/sonar-pro | run 1

## Prompt

Minimize total time to finish these tasks, one at a time, respecting dependencies: A (2h, no deps); B (3h, needs A); C (1h, no deps); D (2h, needs B and C). Give a valid order and the total time.

## Response

A valid minimum-time order is **A → C → B → D**. The total time is **8 hours** because all tasks must be done one at a time, so the finish time is just \(2 + 1 + 3 + 2 = 8\) hours, and this order respects all dependencies[5].

## Why this works
- **A** must come before **B**.
- **B** and **C** must both finish before **D**.
- **C** can be done anytime before **D**, so placing it after **A** is valid.

## Total time
- **A**: 2h
- **C**: 1h
- **B**: 3h
- **D**: 2h

**Total: 8h**

Would you like the same answer shown as a dependency graph or a topological sort?
