If the function of demand and supply on the following image

And the government decided to impose a tax of 30$ on each unit sold. The following is required:

1- The equilibrium quantity before tax? 2- Equilibrium price before tax? 3-Equilibrium quantity after tax? 4- Equilibrium price after tax? 5- How much does the consumer bear from the tax? 6- How much tax does the product bear?

P= 120 - 400 P=60 + 2Qs