Assuming hastags$\_$df is a Spark DataFrame, what does the following code do$?$hastags$\_$df$.$ registerTempTable $($ 'hashtags'$)1-$ Creates a new DataFrame named 'hashtags' from the DataFrame 'hastags$\_$df$"\mathrm{.}2-$ Registers the DataFrame 'hastags$\_$df$\text{'}$ as a temporary table named 'hashtags' in Spark's SQL context$\mathrm{.}3-$ Deletes the DataFrame 'hastags$\_$df$\text{'}$ and creates a temporary table named 'hashtags'$\mathrm{.}4-$ Retrieves the schema of the DataFrame 'hastags$\_$df and stores it as a temporary table named 'hashtags'