Download the file called: Hw$1\_$data. Be sure to properly label $($title$,$ axis labels, legend if applicable$)$

your graphs!

B$1$ Using the data on the motor fuel octane rating of several blends of gasoline, create a histogram. First,

let Excel or Matlab choose the number of bins. Second, create a second histogram in which you specify

$16$ bins.

B$2$: Using the data on U$.$S petroleum imports as a percentage of the total petroleum products, by year

since $1973($source: U$.$S$.$ Department of Energy We site, www$.$eia.doe.gov$/($Links to an external site.$))$:

a$)$ Create a histogram of the data and a time series plot.

b$)$ What can you tell from the time series plot that you can$$t from the histogram?