Show in a graph the autarky equilibrium for an economy whose production possibilities frontier has a decreasing opportunity cost feature.

Show in a graph the autarky equilibrium for an economy whose production possibilities frontier has a decreasing opportunity cost feature. Mark the angle that shows for consumers the value of the last x they consume in terms of y (i.e., MRS of x for y). Then mark the angle that shows the opportunity cost of the last x made in terms of y (i.e., MRT of x for y).