write the following code in racket or scheme

;; : calculate the total area covered by a set of rectangles (Quad-trees and immutable data-structures)

(provide rectangle-area)

; rectangle-area: returns the total integer area covered by any (one or more) rectangles in the given list ; must be in O(n log n) ; try implementing an immutable quad-tree to represent 2D space; . (define (total-rectangle-area rectangle-list) 'todo)