l. The \"index of public safety\" in a city is given by one minus the crime rate. For example, and index of 0.90, or 90%, means that 90% of the population will not be a crime victim during a given year. The public safety index, denoted S, depends on the number of police in a city as well as its population. The relationship is S = 13.2(P-2)(n'-3), Where P is the number of police and n is the city population. a) Using the formula, identify and interpret the elasticity of congestion for public safety