A company maintains a fleet of vehicles that consist of both cars and trucks. The miles per gallon realized in the cars follows a normal distribution with mean of 30 and a standard deviation of 2 while the miles per gallon realized in the trucks follows a normal distribution with mean of 17 with a standard deviation of 3. Which distribution is more variable? i. they have the same variability
ii. the mpg for the trucks
iii. the mpg for the cars
iv. there is insufficient information to answer the questions