The picture in this exercise (unfortunately I cannot find a copy of it anywhere to show you) is an interesting image. The message is supposed to be the dangers of drinking alcohol while pregnant but however I did struggle to work out that the glass has alcohol in it.
The signifier is a woman holding a glass of liquid. The signified is a pregnant woman holding a glass of alcohol. The punctum could be the baby bump however my eye is drawn to the liquid.
I don’t think that this image does the job as its just a woman standing there with a glass of liquid that could or could not be wine. There is nothing here that tells you about the dangers of drinking alcohol while pregnant so I don’t think that it does that job as the brief was clearly stated that the message was to show the dangers of drinking alcohol while pregnant.