1.Describe the general guidelines for structuring data-entry fields. Can you think of any instances when it would be appropriate to violate these guidelines? 2. Describe four types of data errors. 3. Describe the types of system feedback. Is any form of feedback more important than the others? Why or why not? 4. Describe the general guidelines for designing usable help. Can you think of any instances when it would be appropriate to violate these guidelines?