Final answer:
In the left panel of the Merode Altarpiece, the patrons Peter Engelbrecht and his wife Margaretha Scrynmakers are depicted observing the Annunciation scene in the center panel.
Step-by-step explanation:
The student has asked about the figures depicted in the left panel of the Merode Altarpiece. However, it appears there has been some confusion as the information provided in the references refers to other works and not to the left panel of the Merode Altarpiece. The Merode Altarpiece is a work by artist Robert Campin and is known for its complex iconography and fine details that are characteristic of Northern Renaissance art.
In the left panel of the Merode Altarpiece, the patrons who commissioned the work, Peter Engelbrecht and his wife Margaretha Scrynmakers, are depicted. They are shown in a domestic interior, watching the Annunciation taking place in the center panel through a doorway, indicating the link between the earthly realm (the donors) and the divine event (the Annunciation).