There is a video where Prof. Mark Keith tells us how to make images smaller. Lets try that.
 
Cairo

I had this exact issue and spent a few hours trying to figure it out, and sizing a few pictures differently was not changing things much. My issue was I had saved a video in my images folder that was quite large, and instead needed to delete it, upload the video to Youtube and put the embeded Youtube link into my code instead. This reduced my zipfile size from 80 MB to 9 MB and allowed it to load. If someone did a similar thing hopefully that saves a future students hours of headache on finals weekend!

I had this exact issue and spent a few hours trying to figure it out, and sizing a few pictures differently was not changing things much. My issue was I had saved a video in my images folder that was quite large, and instead needed to delete it, upload the video to Youtube and put the embeded Youtube link into my code instead. This reduced my zipfile size from 80 MB to 9 MB and allowed it to load. If someone did a similar thing hopefully that saves a future students hours of headache on finals weekend!