Create a sequence diagram for the following use case:

Use Case $1$ Process car calls when elevator is idle on a different floor.

This is the case when the passenger presses the button that is on the wall near the

elevator doors $($in the hallway$)$ to summon an elevator to service this floor.

There are two scenarios for this use case: the passenger presses the up service button,

and the passenger presses the down service button.

Scenario $2\mathrm{.}1$ Car Call service $$ the elevator is moving towards the same direction as

the passenger$$s destination.

Scenario $2\mathrm{.}2$ Car Call service $$ the elevator is moving towards the opposite direction as

the passenger$$s destination.

When the call button is pushed the button is illuminated and a request is made to the

elevator controller. The elevator controller controls the elevator motor to move the

elevator to this floor. When the elevator arrives and is ready, the button is un$-$

illuminated, a bell dings, and the doors open.

Draw out the diagram on piece of paper.