Which two are true about named notations in a PL/SQL subprogram?

The actual parameters must be specified in the same order as the formal parameters are declared.

Specifying actual parameters in the wrong order results in the subprogram terminating with an exception.

Only trailing optional parameters can be omitted in the invocation call.

The subprogram invocations must be changed when the formal parameter list acquires new required parameters.

Any optional parameters can be omitted in the invocation call.