Question 4:
If there is a binding price ceiling and the price ceiling is lowered, we would expect to see the deadweight loss increase. A binding price ceiling creates market inefficiencies, and lowering the price ceiling can exacerbate these inefficiencies, leading to an increase in deadweight loss.

Question 5:
If the market equilibrium is 30 units and the price is $75, and the government imposes a $10 tax, buyers must pay $85 and buy fewer than 30 units. The tax increases the price buyers have to pay, and as a result, they will buy fewer units of the good.

Question 6:
If the government collects $360 of revenue on 72 units sold in a market, the tax on the product must be $5. To calculate this, divide the revenue collected by the number of units sold: $360 / 72 units = $5 tax per unit.