Write a user-defined function that plots an ellipse with axes that are parallel to the x and y axes, given the coordinates of its center and the length of the axes. For the function name and arguments, use ellipseplot (xc, yc, a,b). The input arguments xc and yc are the coordinates X of the center, and a and b are half the lengths of the horizontal and vertical axes (see figure), respectively. This function has no output arguments. Use the function to plot the following ellipses:
(a) xc = 3.5, yc = 2.0, a = 8.5, b = 3
(b) xc = -5, yc = 1.5, a = 4, b = 8

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