UiPath Automation Developer Professional v1.0

A developer is building a process that needs to click an element which requires a mouse hover to become visible. However, the element does not appear with the default click setting. The input method for the Click activity is Send Window Message.
Which property should the developer configure to be able to click the element?

A developer wants to create an automation in which the input from the user and pre-defined conditions determine the transition between stages. In UiPath Studio, which is the recommended type of workflow that meets the requirement?

A developer configured the properties for a Click activity as shown below:

What happens if the activity cannot find its target at runtime?

What is the default priority value for the Job Priority field in UiPath Orchestrator when starting a job manually?

Consider testing a workflow that computes the sum of two numbers having the data driven test data from the Excel file below:

Expanding the functionality of the workflow to compute the sum of three numbers, the data needs to be updated as well to accommodate the new scenario:

What are steps to do that?