Answer and explain whether the following statements are true, false, or uncertain. The explanation is much more important than the actual "true, false, or uncertain" answer. Explanations should be around one paragraph long - no need for a ton of detail, but a one sentence explanation is certainly insufficient.

3) Brand loyalty enables a producer to mark up their sale price above marginal cost, causing deadweight loss and worse outcomes for consumers.

4) Pure public goods are those supplied by the public sector and private goods are those supplied by private producers.

5) Excludable goods may be provided by the private sector, but at quantities less than what is economically efficient.