Binary Search Tree and Associated functions in R5RS Scheme

Assignment details are in the attached PDF. You must write a Binary Search Tree and associated functions in R5RS Scheme.
Hi! Thank you for taking on this project. Everything is in the PDF document, but let me know if you need any clarification. I just want to reiterate that the program must be written in R5RS Scheme. It will be run/tested using DrRacket.