After making the necessary changes so that the images appear on the window $($as required for question $2),$ which of the following is correct after the images are displayed on the window?

a$.$ Each image appears once on the window

b$.$ Each image appears twice on two different control options on the window

c$.$ Each image appears thrice on three different control options on the window

d$.$ Each image appears in four different control options on the window

Assume that the user initiates Add option and fills in all the fields using the Add Item dialog. How does the application handle the data entered by the user, if the bar code provided already exists?

a$.$ It ignores the user request

b$.$ It ignores the user request but warns the user

c$.$ It gives the user the option to change the bar code

d$.$ It allows the user to change the number of items in stock of the existing item

In the given project, how do the view classes access the data in the model classes?

a$.$ via inheritance between view and model classes

b$.$ via signals and slots

c$.$ view objects invoke functions on model objects

d$.$ model classes are composed of view classes