3 In a survey, people were asked how long they took to travel to and from work, on average. The median time was 3 hours 36 minutes, the upper quartile was 4 hours 42 minutes and the interquartile range was 3 hours 48 minutes. The longest time taken was 5 hours 12 minutes and the shortest time was 30 minutes.

1. Find the lower quartile.
2. Represent the information by a box-and-whisker plot, using a scale of 2 cm to represent 60 minutes.