Prerequisite : For you to execute these notebooks, you have to setup the Pyspark in Local Mode or you can log in to Databricks Platform and execute in their environment.
You can refer the below blog to setup the local mode installation and to execute programs in jupyter notebook.
https://sigdelta.com/blog/how-to-install-pyspark-locally/Refer This Link For Detailed Architecture of Pyspark => SparkTutorial
You can also refer the official documentation of Spark(I'm using 3.0.2) => officalDoc