The Following Data Represent Scores on a 15 Point Aptitude

The following data represent scores on a 15 point aptitude test: 8, 10, 15, 12, 14, and 13.
a. Complete the sample mean for the original data.
______________
Subtract 5 from every observation and complete the sample mean for the new data.
______________
b. Complete the sample variance for the original data.
______________
Subtract 5 from every observation and complete the sample variance for the new data.
______________
c. What effect, if any, does subtracting 5 from every observation have on the sample mean and sample variance?
________________________________________________________