a. The girl is wearing a large, gold neck lace. Her clothes seem to be well-made, yet austere. Her head is pulled back into a tall cap, and she has a regal expression on her face. Since she is painted to have a large forehead, white skin, and expensive clothing, she is probably from a rich family, and this is a portrait to be sent to a suitor.
b. The background is dark, making the girl's features and pale skin stand out, in order to show her beauty. They tell us that she wants herself to be the main focus of the picture. This is important, because it tells about her personality, as well as why the portrait was commissioned.
c.The artist wanted the viewers to think of the girl as rich, as well as being the paragon of the fashion then. This is shown when he makes her hairline seem extremely high, and paints her pace as extremely pale. Also, he uses light and brightens her skin, and keeps the background bright in order to make her stand out.
d. This girl's name is Francesca. Her brother and her father are both merchants, making them quite well off. She likes to collect Russian caps and play with her baby sisters. She is shy, but is good with children. She enjoys embroidering flowers.