Suppose the hourly wage is $50 and the price of each unit of capital is $6.25. The price of output is constant at $100 per unit. The production function is f(E, K) = E¹/² * K¹/⁴. Now assume the wage is $25 per hour. In the short run, optimal employment is then E = 16. In the long run, optimal input levels are E = 32 and K = 64. What is the short-run and long-run elasticity of labor demand?