Question 19 (2 points) Saved When you select a radio button, its Checked property changes from True to False, invoking its CheckedChanged event. True False Question 20 (2 points) Case-Based Critical Thinking Questions Case 1: PetPals You have been hired by PetPals Veterinary Clinic to modify its Bill Calculator application. Upon reviewing the application, you notice that all of the controls have their default names. You also notice that the Calculate button's code uses the properties of controls in the calculation statements. Two procedures in the PetPals Clinic application need access to the same variable. You can accomplish this by declaring the variable using the keyword in the form's declarations section. conat ghare Private Val