Use the Observer Pattern to improve the code in Observer.cpp so that:

$1).$ Make People and Organization to be observers$/$listeners$/$subscribers$.$

$2).$ Make FireDept and PoliceDept to be subjects$/$posters$/$publishers$.$

$3).$ People and Organization objects can subscribe themselves to either FireDept or PoliceDept or both at run time.

$4).$ FireDept and PoliceDept objects can send alarm messages to all their subscribers as run time.

$5).$ Clients can always create and subscribe more People and Organization objects to FireDept and PoliceDept objects at run time.

$6).$ In the client code $($the main function$),$ create a FireDept object and a PoliceDept object.

Create a People object named $$Ken$$ that subscribes to the FireDept object. Create a People object named $$Mary$$ that subscribes to the PoliceDept

object.

Create an Organization object named $$CSUSM$$ that subscribes to both the FireDept object and the PoliceDept object.

Let both the FireDept object and the PoliceDept object broadcast alarm messages to their subscribers.