Play audio slide show -- Keyboard shortcut: 'x'  Back to notes -- Keyboard shortcut: 'u'  previous -- Keyboard shortcut: 'p'  next -- Keyboard shortcut: 'n'  Slide program -- Keyboard shortcut: 't'      Functions that generate individual single and double tags.Lecture 4 - slide 27 : 34
Program 3
(define (start-tag kind attributes)
  (if (null? attributes) 
      (string-append "<" kind ">")
      (let ((html-attributes (linearize-attributes attributes)))
         (string-append "<" kind " " html-attributes " >"))))

(define (end-tag kind)
  (string-append "</" kind ">"))