show all work please

Exercice #5: Two students determine the percentage of lead in a sample as a laboratory exercise. The true percentage is 22.52%. The students' results for three determinations are as follows: (1) 2252 22.58; 22.54 (2) 22.64 22.58 2262 a) Calculate the average percentage for each set of data. Clearly show ALL your calculations. Average set (1) = Average set (2) = = b) Without doing any additional calculations, state which set is more accurate based on the average Justify your choice e) Without doing any calculation, which set of data is the most precise? Exercice #6: The widths of copper lines in printed circuit boards must be close to a specified value. Three manufacturers were asked to prepare circuit boards with copper lines that are 0.500 um (micrometers) wide (1 um = 104 m). Each manufacturer's quality control department reported the following line widths on five sample circuit boards given in micrometers) Manufacturer 1 Manufacturer 2 Manufacturer 3 0.512 0.514 0.500 0.508 0.513 0.501 0.516 0.514 0.502 0.504 0.514 0.502 0.513 0.512 0.501 a) What is the range (difference between the highest and lowest values) of the data provided by each manufacturer? Clearly show ALL your calculations. Manufacturer 1: Manufacturer 2: . Manufacturer 3: b) Can any of the manufacturers justifiably advertise that they produce circuit boards with "high precision"? If yes, which one(s)? You do not have to justify your answer. c) Is(are) there a data set(s) for which this claim might be misleading? If yes, which one(s). Justify your