Explain with properly

A. According to the Coase theorem, why would a Hobart zinc refinery that is legally allowed to emit pollution agree to reduce its pollution emissions even though it is not in its own private interests?How might transactions costs prevent this?

B. Suppose 3 kelp harvesters each send 1 boat each week to harvest bull kelp off Granville Harbour. Each boat returns with a harvest worth $1,150.It costs $1000 per boat per week to harvest the bull kelp.Every additional boat beyond 3 that is sent to harvest kelp results in the harvest falling by $50 per boat for all kelp harvesters.

1. Why does an individual kelp harvester have an incentive to add another boat?

1. Why is adding another boat not socially optimal?