Which of the following does not describe diseconomies of scale?

increasing average costs of production

inputs increasing faster than output

decreasing returns to scale

decreasing average costs of production

The law of diminishing returns to the variable factor shows that:

the firm enters a stage where its average cost is increasing

the firm's marginal revenue is decreasing

the firm's marginal product is decreasing

the firm's marginal product is increasing

With 50 units of labor, a firm can produce 2,000 units of output; with 60 units of labor the firm can produce 4,000 units of output. The marginal product of an extra unit of labor is

200

10

60

20