What systems development model approach would you use to develop this system?, assignment help

Q1: (2pg)

I’m writing a paper about communication strategies used with children with autism spectrum disorders

I need a research study about picture exchange commuincation system (PECS) to use as a source in my paper

Q2: (1pg)

Based on your reading and study:

1. What systems development model approach would you use to develop this system?
2. Why is the system a good match for the systems development model you chose?
3. What would be the advantage of using your chosen systems development model?
4. What situations might you encounter that would be a problem for the model you chose?
5. What would be your second choice of a systems development model for this system and why?