```

1.  The long line of men raising their
hands lies along the x-axis in
Fred's space-time diagram.
Do those events also lie along the
x-axis in Jane's diagram?

[How does this compare to
Galilean transformation?]

2.  The man with a bad cold lies
along the y-axis in Fred's diagram.
Does he also lie along the
y-axis in Jane's diagram?

[How does this compare to
Galilean transformation?]

3.  Consider the cough and the sneeze.
What is the time interval between
these two events according to Fred?
According to Jane?

[How does this compare to
Galilean transformation?]

4.  Consider these two events:
the bird chirps
the bird meets the dog

What is the time interval between
the events according to each observer?

What is the space interval between
the events according to each observer?

[How does this compare to
Galilean transformation?]

4a. What is the space-time interval
between these two events according
to each observer?

5.  How fast is the bird flying,
according to Jane?

[How does this compare to