A process has a mean of 10 and a standard deviation of 2. if the process has been marked as stable, what would be the range between which you can expect from the process to fall within:

A process has a mean of 10 and a standard deviation of 2. if the process has been marked as stable, what would be the range between which you can expect from the process to fall within:
a. 16 & 4
b. 10 & 4
c. 12 & 8
d. 14 & 6
e. 6 & 14