The basic concept of Signal Detection Theory $($SDT$)$ is that an observer must correctly determine whether a signal is or is not present in the presence of noise. So$,$ imagine that you are driving on Memorial Drive with your music blasting $($i$.$e$.,$ the noise$)$ and an ambulance is approaching from behind. Select the correct answers relative to SDT for this scenario.

If you can clearly differentiate between your music and the ambulance's siren, this is a measure of what?

You keep driving to your destination while enjoying your music.

The ambulance is $2$ cars behind you but you don't notice it or hear it$.$

You notice the ambulance and you pull over.

You thought you heard a siren, so you pull over.

You are drowsy or tired and would have a difficulty time making a decision if there was an emergenvy. This is an example of what?