Scenario: Wayne Enterprises, a global powerhouse valued at over twenty-seven billion dollars, was founded by Bruce Wayne, who serves as its president and chairman. With a vision for innovation, Bruce has brought you in to assist his IT team as they implement Microsoft Azure Machine Learning. During a workgroup session, the team is discussing Apache Spark, a distributed computing environment where workloads are parallelized across executors. A team member poses a key question: At which two levels does Spark parallelization occur? Question: What two levels should you explain to the team to clarify how Spark parallelization functions?