You recently created a database and configured the SPFILE with the following parameter settings to ensure that Oracle automatically adjusts the memory for the Program Global Area (PGA): SORT_AREA_SIZE = 150M HASH_AREA_SIZE = 150M BITMAP_MERGE_AREA_SIZE = 150M CREATE_BITMAP_AREA_SIZE = 150M WORKAREA_SIZE_POLICY = AUTO You have not included the PGA_AGGREGATE_TARGET initialization parameter in the SPFILE and the System Global Area (SGA) is currently sized at 4G. What is the total PGA memory allocated across all database server processes?()