(It's possible)
could
(It's possible)
could
(It's impossible)
can't
(It's possible)
could
(You are sure)
must
(It's impossible)
can't
(It's probable)
may / might
(It's probable)
may / might
(You are sure)
The baby must...
(It's possible)
could
(You are sure)
must
(You are sure)
must
(It's probable)
may / might