16.14. Consider an economy that consists of three individuals: Maureen (M), David (D), and Suvarna (S). Two goods are available in the economy, x and y. The marginal rates of substitution for the three consumers are given by and Maureen and David are both consuming twice as much of good x as good y, while Suvarna is consuming equal amounts of goods x and y.

Are these consumption patterns economically efficient?