Sue has $75 to spend on shirts and shorts. The shirts are on sale for $10 each, including tax, and the shorts are on sale for $15 each, including tax.

Complete the following in the Answer Book:

• Write an inequality that represents the situation above, where x represents the number of shirts and y represents the number of shorts.
   
• What is the maximum number of shorts Sue can buy if she buys 2 shirts? Use mathematics to explain how you determined your answer. Use words, symbols, or both in your explanation. (If you need to draw a graph for your solution, use the grid provided in the Answer Book.)
   
• List all the number combinations of shirts and shorts Sue can buy to spend exactly $75. Use mathematics to justify your answer.