Can you help me with this please , a,b and c are question to the situation express in 2.

2.The use of face mask prevents spread of the Coronavirus. However, some people still refuse to wear a mask.

A.Graph and briefly explain the socially efficient outcome of this externality highlighted in 2. above

B.Graph, discuss and compare two strategies that will yield the socially efficient outcome.highlighted in 2. above

C.Explain if this externality highlighted in 2. above can be resolved by using Coase Theorem. Highlight conditions leading to the resolution or lack thereof.