Problem 3. 3 A) Explain what is meant by the word "calibration" and what does an "unbroken chain of calibrations" mean? 3B) Define "accuracy" and "precision" as these terms relate to measurement 3 C) Four students were asked to weigh a sample that had a true value of 1.49. They repeated their measurements four times. The following is their results. 3C-1 Which student has accuracy? 3C2 Which student has precision? 3C-3 Which students have neither accuracy or precision