At 18 55, Irene started driving at 56 km/h from her home to a hypermart 28 km away. She was at the hypermart for 2 h 12 min.
- What time did she leave the hypermart?
- After leaving the hypermart, Irene 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?