(set! resume k2) ; now what will happen when resume is called?
; when the next line is executed, what will yield be bound to?
(set! resume k2) ; now what will happen when resume is called?
; when the next line is executed, what will yield be bound to?
(set! yield k3) ; now what will happen when yield is called?
; when the next line is executed, what will resume be bound to?
(set! yield k3) ; now what will happen when yield is called?
; when the next line is executed, what will resume be bound to?