Consumers X and Y consume only two goods, nuts and berries. X's utility function isU(Nx,Bx) =NxBx.Y's utility function isU(Ny,By) = 2Ny+By. X is endowed with 3 units of berries and 8 units of nuts. Y is endowed with 6 units of berries and 8 units of nuts. In a competitive equilibrium for this economy, how many units of berries does consumer X consume?

a.

9.50

b.

7.50

c.

19.50

d.

12.50

e.

5.50