Create a function to do a benchmark for the linear algorithm, $```$timeit$\_$linear$()```$ using $```$timeit$.$Timer$```$ as we did in class.

$1.$ Pass an array of random integers, $```$x$```,$ and measure how long it takes to run the linear algorithm in the $```$f$\_$linear$()```$ function.

$2.$ Set $**$t$.$timeit$($number$=1)**.$ Otherwise the code will run much more slowly.