At 17 29, Nora started driving at 60 km/h from her home to a boutique 42 km away. She was at the boutique for 2 h 34 min.
- What time did she leave the boutique?
- After leaving the boutique, Nora drove back along the same route and took 28 min to reach home. What was her average speed, in km/h, for the journey home?