A display substrate and a method of manufacturing the same. The first diameter being larger than the second diameter. Various aspects of the residential fire sprinkler, including a method of protecting a residential dwelling unit are described. The particular regimens provide vital nutrients necessary to re-build fatty acids that may have been lost or reduced in the myelin sheathing and other locations of brain, therefore decrease one’s susceptibility to multiple sclerosis and prevent reoccurrence of the disease. Additional velocities may then be extrapolated for different regions or subsequent frames of data for a same region. The method calculates the user’s vocal range and uses that vocal range in generating a score.