P(s)=−(s−a)2+bP, left parenthesis, s, right parenthesis, equals, minus, left parenthesis, s, minus, a, right parenthesis, squared, plus, b The Yerkes-Dodson law predicts that the relationship between stress level, sss, and performance, P(s)P(s)P, left parenthesis, s, right parenthesis, of a difficult task can be modeled by a function of the form shown above, where aaa and bbb are constants related to the measures of stress and performance for a particular task. What is the best interpretation of aaa in this context? Choose 1