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Assume that we have an assembly line that can take a picture of a machine part which moves along a conveyor belt. The picture (or image) is represented as a 2D grid of pixels which are either black or white. The pixels can be accessed by specifying the row and column of the pixel where rows and columns are specified by an integer value. The machine examines the images and attempts to determine whether or not the parts are broken. A broken part will appear as a set of black pixels which are not all connected together (i.e., there is a separation between one or more sets of black pixel groups. Here are some examples of four possible images. Note that (c) and (d) represent images of broken parts. The red border represents the perimeter of a part composed of black pixels

Complete the findStart() method that returns the location (row/column) of any black pixel in the image. It uses the Point2D class (from the javafx.geometry package) as the return value (you will have to look up this class in the Java API documentation to see how to use it, if you have not used it before). If no black pixel is found, the method should return null.