$($Click the Initialization button to set up the animation and the Start button to start playing the animation.$)$

You need to answer both of these questions correctly to get credit. Remember that you can click and drag the left mouse button to find the location of the cursor. First, what is the average speed of the ball during the time interval between $t=4\mathrm{.}0s$ and $t=8\mathrm{.}0s?($Assume that the mouse coordinates are labelled in units of meters. Use the buttons to contro the animation. The ghosts are produced at $1$ second intervals.$)$

$3\mathrm{.}0$

And second, is the motion uniform or non$-$uniform? $$ Uniform $q,$ Non$-$Uniform