System study is the ____ stage of system development life cycle.

The dotted line below the boxes is called the ____ .

The following is a Class draw using UML notations
SetPosition(service) is

The following is a Class Circle draw using UML notations
Visible is

The following is a Class Circle draw using UML notations
isVisible (service) is

The following is a Class Circle draw using UML notations
Position (attribute) is

The following question refer to the sequence diagram below:
F is a(n) ____ object.

The following question refer to the sequence diagram below:
C is a(n) ____ object.

The following question refer to the sequence diagram below:br> G is a(n) ____ object.

The following shows use cases for placing an order.
When placing an Order, it is necessary to supply, customer information, information about the ordered products and arrangements for mode of payment (can be credit or cash). Most of the time, the customers are sure about the products to be ordered, but, sometimes, they request for a product catalogue. The use cases participate in relationships between themselves (A to F).
Select the relationship of C