def calculateBounds(coordinates):
	"""
	caculates the upper and lower bounds of the coordinate set
	"""
	x_values = [coordinate[0] for coordinate in coordinates]
	y_values = [coordinate[1] for coordinate in coordinates]
	max_x, min_x = max(x_values), min(x_values)
	max_y, min_y = max(y_values), min(y_values)
	
	return min_x, max_x, min_y, max_y