Train Jonathan Doubek on adding additional properties

Click on the documentation in the Properties box below to go over documentation, then do the practice below.

Practice:

• Add an additional property with the name led by and the value Jonathan Doubek to this task.
• Set the progress of this tasks to 50 percentage.
• Add an additional property of your choice. E.g. related to, ...
• Set the progress of this tasks to 100 percentage.