You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. The application contains a form named frmMain that contains a button named btnSave. You create a…

You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. The application contains a form named frmMain that contains a button named btnSave. You create a ProgressBar control named saveProgress. Initially, saveProgress is not displayed on frmMain. When a user clicks btnSave, you have the following requirements:

• saveProgress is slightly visible after 0.2 seconds
• saveProgress is fully visible after 1 second

You need to declare the corresponding storyboard. You write the following code fragment. (Line numbers are included for reference only.) 01 <Storyboard x:Key="animateProgress" TargetName="saveProgress"> 03 </Storyboard> Which code fragment should you insert at line 02 to complete the declaration?