Write a function that takes, as arguments, the x- and y-coordinates of two points and returns a string reflecting the x- and y-coordinates of the midpoint of the line segment determined by those two points, using decimal division (here is where there is a difference between versions of python). follow the sentence structure indicated in the example, and round the values to the nearest tenth. name your function getmidpointstring(x1, y1, x2, y2).