How many eighth notes do you need to total the amount of a dotted half note

Ineed someone to describe what they mean in the instructions !

Agood career plan includes all of the following except

Where does middle c get it’s name? a. it sits in the middle of a brass clef b. it sits in the middle of the grand staff c. if sits in the middle of the alto clef d. its sits in the middle of the treble clef