Which of the following code blocks correctly converts the `openDate` column (stored as integer UNIX timestamps representing seconds since 1970-01-01) into a string column `openDateString` formatted using Java's SimpleDateFormat (e.g., "Sunday, Dec 4, 2008 1:05 pm")? Given the following sample data from `storesDF`: ``` storeId openDate 0 1100746394 1 1474410343 2 1116610009 3 1180035265 4 1408024997 ``` | Databricks Certified Associate Developer for Apache Spark Quiz - LeetQuiz