-12.5 because 7pm to 10pm are 3 hours.
Which is 3 times -2.5 and it equals -7.5 plus -5 which is -12.5
Since the starting and original place is a 4 x 3 rectangle, and the new position already has a side length of 3. We are now going to look for the two points that make a second side of 4. So, the points C(1, -5) and D(4, -5) satisfy the requirements.