3. (2.6 pts) A group of students are presenting a group lab report. They need to report the average mass of three blocks of wood. The table below shows the students measurements, using an analog scale: a. To what decimal place is this scale certain? b. How many significant figures does Student A's measurement of Block 1 have? c. How many significant figures does Student B's measurement of Block 3 have? d. How many significant figures does Student C's measurement of Block 2 have? e. Report the average mass of each block using scientific notation, both in g and lb