b) In terms of the production function Y = A x F(L, K) where A is the state of technology, L the level of employment and K the stock of capital, the level of potential output and the long run aggregate supply curve, LAS, is defined by: O a fixed state of technology with different capital stocks and unemployment rates. O a fixed unemployment rate, a fixed stock of capital and a given state of technology. O a fixed stock of capital, a given state of technology and unemployment at the natural rate. O a fixed stock of capital and a given state of technology and the current unemployment rate