You set the following parameters in the parameter file and restart the database instance: Which two statements are true?

If `MEMORY_TARGET` is configured to 500 MB and `MEMORY_MAX_TARGET` is not explicitly set in the parameter file, Oracle automatically sets `MEMORY_MAX_TARGET` to match `MEMORY_TARGET` during instance startup.

`PGA_AGGREGATE_TARGET` and `SGA_TARGET` are typically set when AMM is not fully enabled and are not automatically set to 0 when AMM is in use unless specifically configured as such.

If `MEMORY_TARGET` is not set or set to 0, and `MEMORY_MAX_TARGET` is also not set or set to 0, Automatic Memory Management (AMM) is disabled, and the `MEMORY_MAX_TARGET` value effectively remains zero for the instance.

`PGA_AGGREGATE_TARGET` and `SGA_TARGET` define memory targets, not lower limits, for their respective areas when AMM is not fully enabled.

The instance will start up, as setting `MEMORY_TARGET` enables AMM, and if `MEMORY_MAX_TARGET` is not explicitly set or set to 0, it defaults to `MEMORY_TARGET` value, which does not prevent startup.