Examine an extract from a PGA Memory Advisory for your database: Which two inferences are correct? (Choose two.) 

Automatic management of PGA memory is disabled. 

The current PGA size requires the use of a temporary tablespace for sorting operations. 

The current PGA size is sufficient and does not require the memory manager to allocate more memory. 

PGA size should be increased at least four times its current size for significant improvement in performance and disk space management.