2. AT&T charges $40 for a smartphone with unlimited minutes plus data charges. In addition to the smartphone charges, AT&T charges $20 for up to 2gb of data, $30 for data above 2gb but below 6gb, $40 for data from 6gb up to 10gb, and $40 for any data 10gb and above.
Draw the graph of these fees
2a. How much is your total bill if you use 6.5gb of data?

2b. How much is your total bill if you use 9.5gb of data?