Assume that a concrete producer is the only firm within 300 hundred miles. The firm faces a downward sloping demand curve according to the demand (in tons) at various prices shown in the table. The firm's marginal cost is $2.00 per ton and fixed costs are $1,000.

Price	Quantity
$2.00	2,400
$3.00	1,400
$4.00	400

1. Derive the demand equation for concrete.
2. Graph the demand and any other information or equations relevant to this market scenario/context.
3. Find the profit maximizing quantity and price. What is the profit at this point?
4. Is this an efficient outcome? Explain with numbers and words.
5. Suppose a per-ton concrete excise tax is suggested. Given this market scenario, what would be the expected impact of this tax? Provide calculation and explanation support.