Ex-2.22

Why reverse order is obtained?
Let us see the execution of iter...
(iter '(1 2 3 4) '())
(iter '(2 3 4) '(1))
(iter '(3 4) '(4 1))
(iter '(4) '(9 4 1))
(iter '() '(16 9 4 1))
'(16 9 4 1)

After trying to "fix" here is what the execution of iter looks like..
(iter '(1 2) '())
(iter '(2) (cons '() 1))
(iter '() (cons (cons '() 1) 4))
(cons (cons '() 1) 4) => this is not (list 1 4)