3. The parametric equation for an ellipse centered at (h, k), whose major and minor axes are parallel to the x and y axes, is x= h+a.cos(theta), y= k+ b.sin(theta). Create a function that will plot the entire ellipse, given the inputs h, k, a and b. Use the function to obtain the plot for the case h= -2, k=4, a = 1, b = 2.