In the STEP $7$ section of your template, plot a second professionally formatted figure $[$link$]$ that displays the model line using the plot command, the mean settling velocity, and error bars representing the standard deviation $[$link$]$ at each concentration using the errorbar command.

Note: errorbar is a specialized plotting command that allows you to plot x$-$y points with a defined error bar centered on each point. The command requires the x$-$values as the first input, the y$-$values as the second input, and the error bar definition as the third input. The final component is the marker specification, just like in the plot command.

In this problem, the proper syntax is: errorbar$($concetration$,$ mean$\_$settlingVelocity$\_$vec, standard$\_$dev$\_$vec, $\text{'}$r$*\text{'})$

$--$ concentration is your vector of time values

$--$ mean$\_$settlingVelocity$\_$vec is your vector of mean settling velocities

$--$ standard$\_$dev$\_$vec is your vector of the standard deviation values