the amount of flow through a solenoid valve in an automobile pollution control system is an important characteristic. an experiment was carried out to study how the flow rate depended on three factors: armature length, spring load, and bobbin depth. Two different levels (low and high)of each factor were chosen, and a single observation on the flow was made for each combination of levels.

A. the resulting data set consisted of how many observations?

B. is this an enumerative or analytic study? explain.