Question: Upon receiving a Floor Granted message from the floor control server interface with the first bit in the subtype set to '1', what actions does the floor participant interface undertake toward the MCPTT client?
Option 1: Sends the Floor Granted message to the MCPTT floor participant and enters the 'P: has permission' state.
Option 2: Stores an indication for a Floor Ack message expectation but does not forward the Floor Granted message.
Option 3: Enters the 'P: has permission' state without processing the subtype's first bit requirement.
Option 4: Sends the Floor Granted message to the MCPTT floor participant, stores an indication that a Floor Ack message is expected, and then enters the 'P: has permission' state.
Explanation: When receiving a Floor Granted message with the subtype's first bit set to '1', the interface forwards the message to the MCPTT floor participant, stores an expectation for a Floor Ack message, and transitions into the 'P: has permission' state, completing all specified actions in response to the subtype indication.