Create 4 email banners to promote 3 events

Hello,
We need 4 relatively simple images to promote our 3 different courses. 3 Images will follow the same brief and will have to be almost identical; 1 image slightly different - promoting a discount - but still quite simple. We need a rather quick turnaround - by Monday. Previous examples attached although improvements, different ideas are most welcome. Copy will be provided. Please attach examples of similar design work when showing interest.
Thank you