Amanda and Boris both consume the same goods in a pure exchange economy. Amanda is originally endowed with 9 units of good x and 6 units of good y. Boris is originally endowed with 18 units of good x and 3 units of good y. They both have the same utility function with respect to their own consumptions:

U_i(x_i,y_i)=x_i^1/3 y_i^1/3 where i=A,B and A indicates Amanda, B indicates Boris.

Let price of good y be $6.

The market clearing price of good x at the competitive equilibrium is ??? .

In the competitive equilibrium, Amanda consumes ??? units of x.

In the competitive equilibrium, Boris consumes ??? units of y.

In the competitive equilibrium, the value of Boris's endowment is ??? .

The equation for the contract curve is ax_A=bx_B. The value of a is ??? and b is ??? .

In the competitive equilibrium, the net demand for good x for Boris is ??? .