Spring 2001 CS100M    Solutions to Exercise E9

1. if you have trouble reading and posting to newsgroups,
   ask CIT for help.

2. f: bounded, by N=0:  $length(x) <= 0$
   g: unbounded:        given an $N$, set $y=N+1$: $length(x)=y>N$
   h: bounded, by N=20: $length(x) <= 20$.

tally of responses:

-->  94 f: bounded
     65 f: unbounded

     80 g: bounded
-->  79 g: unbounded

-->  86 h: bounded
     73 h: unbounded

        f g h
        - - -
     39	b u b    0 errors

      5	U u b \
      5	b B b  > 1 error
     33	b u U /

     17	b B U \
      2	U u U  > 2 errors
     37	U B b /

     21	U B U    3 errors