A metropolitan PD has recovered methamphetamines in two separate incidents. There are 47 samples in the first seizure, containing an average of 0.35 mg/L of methamphetamine per sample with a standard deviation of 0.12 mg/L. In the second case, there are 32 samples with an average of 0.41 mg/L of methamphetamine with a standard deviation of 0.21 mg/L. The population standard deviation is unknown and will be assumed to be unequal. Is the methamphetamine concentration the same between these two seizures? A. Calculate the 95% and 99% confidence interval. B. State and test the null and alternative hypothesis about the methamphetamine concentration of the two seizures at a significance level of =0.05 and =0.01