The lifespan of a certain brand of an electric motor is normally distributed with a mean value of 10 with a standard deviation of 2 years.Find the 80% percentile of the motor lifespans, i.e., find a value c so that there is an 80% chance that a randomly selected motor's lifespan is less than c, and there is a 20% chance that a motor's lifespan exceeds c.

Group of answer choices

11.68 years

10.96

12.45 years

1.68 years

12.84