Q$01.$ Use "Auto MPG$"$ data file for this assignment. Verify that the sample size $($number of rows of data$)$ is $398.$ Use this data file to answer all questions on this assessment. Variable definitions are as follows:

id: unique record ID

mpg: miles per gallon

cylinders: number of cylinders

displacement: engine displacement $($in cubic inches$)$

horsepower: engine horsepower

weight: vehicle weight $($in lbs$.)$

acceleration: time to accelerate from $0mph$ to $60mph($in seconds$)$

model$\_$year: model year

car$\_$name: car name

What is the maximum value of $mpg$ in the sample?

$46\mathrm{.}6$

$23\mathrm{.}5$

$8\mathrm{.}0$

$9\mathrm{.}0$