4/17 is the deadline for your matriculation agreement with the program, including paying the deposit to secure your seat. There is an agreement document for you to read and sign on your portal. If you don't pay and sign the matriculation agreement by 4/17, you will be considered discarding your acceptance. There are more detailed information and instructions in the document to remind you what you are going to do AFTER you pay the deposit and agree with their policy on 4/17, which includes the transcript submission that I had the screenshot with earlier. That being said, you can take that 5-week class to fulfill the prerequisites requirement and submit your final transcript 2 weeks prior to the first class starting in Fall.