Did I do it right? Please help ASAP!

You’re repairing a large rectangular aquarium. the final step is to cover the glass with a protective film. the front and back of the aquarium measure 4 meters by 2 meters, and the sides of the aquarium measure 3 meters by 2 meters. how many square meters of protective film do you need? ( )

When y’all answer can y’all explain too !

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*