If a firm is considering its price 9% and has hire an econometrician to estimate the elasticity of demand for its product. The econometrician estimates the parameter of a log - linear demand function and reports that the parameter estimate for the elasticity of demand is -1.5 and the standard error of the estimate is 0.3

a. If the firm raise its price by 9%, what is the expected change in quantity demanded?

b. Approximate the upper and lower bounds on the 95% confidence interval for the change in quantity demanded?