Q4
Single choice
In a manual task, there are three text fields configured: FIrstName, LastName, and FullName. In the FirstName and LastName fields, a Constraint Behavior is configured. In the FullName field, a Calculation Behavior is added with the following XPath expression:

While executing the manual task, a user enters values in the FirstName and LastName fields, but the FullName field is not calculated automatically.
What should be done to have the FullName field automatically calculated?