The difference (Before - After) of the reaction time before and after caffeine intake has a mean of 0.049, median of 0.052, standard deviation of 0.029, first quartile of 0.029, third quartile of 0.069, and IQR of 0.04. The sample size is 200 and standard deviation of 0.029. Calculate a 95% confidence interval for the mean difference (Before - After)