N = 10,000 - where is the premium

Assume that the marginal cost of people as they start to buy insurance is as follows MC = 5000 - N/2

1.At what fixed dollar tax will everyone want to buy insurance in this market? That is, people choose to either pay the tax or pay the premium. How much revenue will the government raise through this tax at this rate?

2. How does this problem relate to US Health insurance problem?

plz answer not hand writing