Please write out your problems completely and exactly. Attached photos are often impossible to read.
We'll be glad to help you, but we'll first need to see where you're having difficulty. If you genuinely "do not understand them at all", then you may need to consider doing a few days (or weeks) of online study (or else hiring a qualified local tutor) in order to get your understanding caught up to where your class is. So, when you reply with the texts of the exercises, please also include a clear listing of your efforts so far, or else a stipulation that you're needing lesson links. Thank you!