3. A group of five students attempted to estimate 100g of a substance and obtained the following masses after each estimated amount was weighed: 95.8634g,80.8125g, 106.5078g,98.2865g, and 86.4453g. Use the data to determine the answers to the following questions: a) What is the mean? And what is the true value? b) What are the average deviation and % deviation from the mean? c) What are the error and \% error