5. A student is designing an experiment to determine the density of a small steel ball. The student has only the ball and a beaker filled to the top with water (density - 1 /gcm'). Which of the following correctly identifies the equipment that can be used to determine the ball's density and the minimum number of measurements needed? a. Equipment: volumetric flask & minimum number of measurements: 2 b. Equipment: mass balance & minimum number of measurements: 2 c. Equipment: volumetric flask & minimum number of measurements: 3 d. Equipment: mass balance & minimum number of measurements: 3