At 17 45, Erika started driving at 72 km/h from her home to a boutique 42 km away. She was at the boutique for 2 h 36 min.
- What time did she leave the boutique?
- After leaving the boutique, Erika drove back along the same route and took 36 min to reach home. What was her average speed, in km/h, for the journey home?