UiADAv1 UiPath Automation Developer Associate v1.0

How can the value be configured for each of the three arguments (one "In", one "Out", and one "In/Out") in the Arguments window of the Invoked Workflow?

DRAG DROP -
A developer has opened a pre-existing workflow that utilizes UI Automation within Google Chrome, but the Google Chrome extension has not been installed on their computer.
What steps should the developer take to install the Google Chrome extension from UiPath Studio?
Instructions: Drag the Description found on the left and drop it on the correct Step Sequence found on the right.

What are the three source control plug ins found in the backstage view of UiPath Studio in Home - Tools - Plugins?

A developer utilized the Add Data Row activity to insert a row into a data table called "dt_Reports". However, during runtime, UiPath Studio encounters an exception, "Add Data Row: Object reference not set to an instance of an object." because the data table has not been initialized.
To rectify this issue, what should the developer include in an Assign before the Add Data Row activity?

What is the best method for passing data across activities within workflows?