Passengers using New York's MetroCard system must swipe the card at a rate between 10 and 40 inches per second, or else the card must be re-swiped through the card reader. Research shows that actual swipe rates by subway riders are uniformly distributed between 5 and 50 inches per second.
Determine the following:
(a) Mean swipe rate
(b) Standard deviation of the swipe rate
(c-1) 1st Quartile
(c-2) 3rd Quartile
(d) What percentage of subway riders must re-swipe the card because they were outside the acceptable range?