a. What is the smallest unit of measurement on the ruler above? (e.g., millimeter, centimeter) b. How accurate do you think you can be when measuring an object with this ruler? Explain your answer. 2. Measurement: c. Based on the image provided, what is the length of the blue object placed on top of the ruler 1cm 0.5cm 1.5cm 2.5cm Object to measure mm 0 1 2 3 456 7 water mL 50 40 30 20 20 10 10 Aluminum block 3. Place a 2.72 gram aluminum block at the bottom of a graduated cylinder. Then, add 40.00 grams of water to the cylinder, and observe the water level rise, as indicated in the provided image. Given that the density of water at room temperature is 1.00 g/ml, calculate the density of the aluminum block. Include your calculation process