Science Homework Help

Can you help me understand this Science question?

Listen to this talk. 

1. Answer this question from the video: At what time on the solstice, the shadow of the person’s head looking at the well blocks the sun?
2. Share a question, as simple or as complicated as you want, preferably related to science, or about something you think it could be answered through scientific inquiry, about something you would like to know? For example, why do sharks have a skeleton made of cartilage? or why does our body stop growing in size after certain age? why do cry when something hurts? …

https://youtu.be/F8UFGu2M2gM