Write a function that returns a buffered image of size 200x200. The image should have TYPE_INT_RGB color components, and it should contain four ovals of width and height 100 (i.e., circles) drawn in this exact order:
a red circle, at position (50, 50)
a yellow circle, at position (50, 75)
a green circle, at position (75, 50)
a blue circle, at position (75, 75)
The return value of the function should be a BufferedImage with the following contents: