Since I can't physically insert the appropriate heading, with units, I'll make the data table below by using the information given.
Disk-----------Measurement of ZOI (mm) also acceptable is ZOI (mm)
A--------------13 ( +/- 2 mm)
B--------------8
C-------------0
D-------------9
When you shower with hot water, everytime you get out the shower, outside it is cold, but inside it is hot due to the hot gas particles. When you shower with cold water, it is the opposite.