Help I am lost in this economics class

Question

Please answer the following questions. I am lost on what to do. Number three is about supply, demand ,marginal cost, deadweight graph with cigarettes prices $4.25, $4.50 and $5.50 and at bottom 18 quantity and then 20 quantity. 18 buys $5.50 and $4.25 priced cigarettes and 20 bought $4.50 cigs. One demand line and two supply lines (S1 and S2)

1. Explain what would happen to equilibrium price and quantity in the market for Pepsi if the following occurred (be sure to indicate WHY it happens as well):

1. The price of Coke decreases.
2. Average household income falls from $50,000 to $43,000
3. There are improvements in soft-drink bottling technology.
4. The price of sugar increases and the Pepsi launches an extremely successful advertising campaign.

1. Use the following equations for demand and supply to solve for market equilibrium price and quantity:

Demand:  Qd = 100 – 4P

Supply:  Qs = 10 + 6P

Using the diagram below, answer the following question

1. How much is the per-unit tax on cigarettes?
2. What price do consumers pay after the tax?
3. How much tax revenue is collected?
4. What is the amount of deadweight loss?

Answer 1

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