Making Decisions in a program. After reading the chapter about the program uses If Then, If .then..Else, and If ..Then Elself statements to make decisions. You also learned to compare values using relational operators and build complex comparisons using logical operators. Finally, you learned how to validate the users input to check for invalid data. why is it important to keep in mind the users goals, and the users mental model on how the application works as you are designing the user interface for a program? In your supporting details, you must include information about the following points: Enhancing the user interface with new control Checking for incorrect input Testing the application