Answer
Step 1. Move the contents of cell number 2 to cell number 1.
Step 2. Move the contents of cell number 3 to cell number 2.
Step 3. Move the contents of cell number 1 to cell number 3.
Work Step by Step
Step 1 erases the original value in cell number 3 when the new value is
written there. Consequently,
Step 2 does not place the original value from cell number 3 in cell number 2.
The result is that both cells end up with the value that was originally in cell number 2.
A correct procedure is the
following:
Step 1. Move the contents of cell number 2 to cell number 1.
Step 2. Move the contents of cell number 3 to cell number 2.
Step 3. Move the contents of cell number 1 to cell number 3
