1. Public goods are usually: (a) Excludable; non-rival (b) Excludable; rival (c) Non-excludable; rival (d) Non-excludable; non-rival 2. Benches in Sydney Hyde Park are: (a) Non-excludable; non-rival (b) Excludable; rival (c) Non-excludable; rival (d) Excludable; non-rival 3. Common resources are usually: (a) Excludable; non-rival (b) Excludable; rival (c) Non-excludable; rival (d) Non-excludable; non-rival 4. Fish in the middle of Pacific Ocean are usually: (a) Excludable; non-rival (b) Excludable; rival (c) Non-excludable; rival (d) Non-excludable; non-rival 5. Find a correct statement. (a) The total product curve shows how a firm's output changes when the firm's cost changes. (b) Average cost initially increases but eventually decreases as output increases. (c) The marginal cost curve intersects the average variable cost curve and the average total cost curve at their minimum points. (d) In the long-run, both capital and labour inputs are fixed. 6. Find a correct statement. (a) The total product curve shows how a firm's output changes when the firm's input changes. (b) Average cost initially increases but eventually decreases as output increases. (c) The marginal cost curve passes through a firm's shut-down point but not the break-even point. (d) In the long-run, both capital and labour inputs are fixed.