A flourmill is concerned that new machinery is not filling bags correctly. The bags are supposed to have a population mean weight of 121 grams. A random sample of 130 bags of flour has a mean weight of 545.7 grams and a standard deviation of 2 grams. For this question, you are required to give your answer in two parts a) and b): a) Enter 3 if Z or 7 if t. Please note, that the values in part a) have no further use in this question. b) Give the value of the calculated test statistic. Please give your final answer correctly rounded to two decimal places. Work to a minimum of 4 decimal places throughout your calculation. a) b)