An individual consumes only two commodities X and Y. She prefers a bundle B1 with 6 units of X and 2 units of Y to a bundle B2 with 4 units of X and 7 units of Y. Also, she prefers a bundle B3 with 2 units of X and 8 units of Y to B1. Are these preferences consistent with our assumptions of consumer theory? (Hint: Draw a diagram, plot all these three bundles and provide a short analysis)