Consider the following sample autocorrelation estimates obtained using 250 data points: Lag 1 2 3 Coefficient 0.2 -0.15 -0.1 Assuming that the coefficients are approximately normally distributed, what is the value of the Box-Pierce Q-statistic ? Select one: O a. 18.09 O b. 37.50 O c.0.12 O d. Not enough information O e. 18.12