Perhaps it may be more beneficial to discuss the concepts needed in Unit 5 instead of focusing the activities. It has always been true that all students do not have to complete every activity bubble of every stage to learn the content. The content in Stage 11 and beyond could help students with their Create task and will be tested on the paper/pencil exam.
Based on your calendar and the needs of your students, feel free to make decisions on how you expose students to the content - loops, arrays and array processing. It might be advisable to go unplugged and do a series of quick lessons on arrays and array processing. It may not be as engaging or inquiry based but students will have access to the content they need for the exam.