Use the menus on the right side of the screen to determine the relevant information you need to diagnose the problem. As you click on a button, the corresponding information will appear in this window. Continue to gather information until you can make a diagnosis.
When you think you know the answer--press the "Ready With an Answer" button. Choose the cause(s) of Farmer Cobb's problem from the list that will be presented.
Your answer will be evaluated and discussed when you press the Submit button. Good luck!