Use the following to answer questions:
Figure: Market for Vaccines 
-(Figure: Market for Vaccines) Refer to the figure. The figure represents the market for vaccines with external benefits. The efficient level of output is ________ vaccines, which is ________ than the market's output.
Definitions:
Average Total Cost
The total cost of production divided by the quantity produced, encompassing both fixed and variable costs to provide a per-unit cost basis.
Fixed Costs
Business expenses that are not dependent on the level of goods or services produced by the business, such as rent and salaries.
Marginal Costs
The financial implication of manufacturing an extra unit of a product or service.
Market Demand
The total quantity of a good or service that all consumers in a market are willing and able to purchase at various prices within a given period.
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