23 (20 points) Like almost all choices that we make, wearing a mask in public has both costs and benefits. a) Describe the costs of wearing a mask in public. b) Describe the benefits of wearing a mask in public. c) An economist would say that wearing a mask in public creates a positive externality. Describe the spill-over effects of wearing a mask in public. d) Oregon chose to require that people wear masks in public. Discuss, in externality terms, the effects of this policy. Did it internalize the externality