I need to know the steps not answers pls HELPPP

The table above shows approximate conversions from gallons to liters. what is the value of x?

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

We just started the introduction into circles and i have no idea how to do this.