Given the following graph, what would the price and quantity traded be if
a) the competitive market is unregulated?
b) external cost are recognized but external benefits are not?
c) external benefits are recognized but external costs are not?
d) both external benefits and external cost are recognized? 
Definitions:
Performance Feedback
The information provided to an individual or group regarding their performance, aimed at reinforcing strengths or identifying areas for improvement.
Employee Behaviour
Actions and conduct exhibited by workers in the course of their employment.
Quantitative Information
Data that can be measured and written down with numbers. It is often used for statistical analysis and objective measurement.
Performance Feedback
Information provided to individuals about the quality of their work, aimed at improving future performance.
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