The following table shows the pay-off matrix for West Ltd. and East Ltd. in an oligopolistic market. Each firm has two options: co-operate or start a price war. Refer to the table to answer the question. 
West Ltd. earns its maximum pay-off when _____.
Definitions:
Heteroscedasticity
A characteristic of a set of data where the variance of the error term is not constant across all levels of the independent variables, which can affect statistical analyses.
Regression Line
A line of best fit through a set of data points in statistical modeling, showing the relationship between the independent and dependent variables.
Dependent Variable
The variable in an experiment or study that is expected to change in response to changes in the independent variable.
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