Hi! I need someone to explain to me what formulas to use to achieve an answer like this.

Suppose the weekly demand for a certain good in thousands of units, is given by the equation P = 28 - 30, and the weekly supply curve of the good by the equation P = 4 + Q where P is the price in dollars. Finally, suppose a per-unit tax of $4. to be collected from sellers is imposed in this market. Complete the following questions. Note: If necessary round your answers to two decimal places. a) Graph the weekly demand, supply (pre-tax), and supply (post-tax) equations. v Supply Curve (without tax) 4..1012141a1a E Quantity (thousandsot unitslweek) m b) What is the equilibrium price before the tax? lEquilibrium Price = $0 I c) What is the Consumer and Producer Surplus before the tax? Note: Remember that the quantity of units on the graph are in thousands. Producer Surplus = $0 Consumer Surplus = $0 d) What is the new Consumer and Producer surplus after the tax is imposed? Note: Remember that the quantity of units on the graph are in thousands. Producer Surplus = $0 Consumer Surplus = $0 e) How much government revenue will this tax generate a week? Note: Remember that the quantity of units on the graph are in thousands. lGovernment Revenue = $0 per week