Help ! Its the last question I ned

The given dot plot represents the average daily temperatures, in degrees fahrenheit, recorded in a town during the first 15 days of september. if the dot plot is converted to a box plot, the first quartile would be drawn at __ , and the third quartile would be drawn at link to the chart is here

Multiple questions for the same graph find the lowest value of the set of data this box-and-whisker plot represents.12131516find the upper quartile of the set of data this box-and-whisker plot represents.20151618

Kari plans to sample 20 people of a population that contains 100 students. she wants to determine how many people wake up before 6 a.m. which sample is the most random?