Suppose that when a transistor of a certain type is subjected to an accelerated life test, the lifetime x (in weeks) has a gamma distribution with mean 28 weeks and standard deviation 14 weeks.

What is one unexpected problem associated with cell phone use? a. it causes you to misjudge distances. b. it decreases the efficacy of your peripheral vision. c. it distracts your hearing from events on the roadway. d. it makes you more susceptible to other distractions.