Please help me with this

Use set buikder notation to represent the following set: {, -2, -1, 0}

Nikolas calculated the volume of the prism. his work is shown below.

Three baby penguins and their father were sitting on an iceberg 0.50.50, point, 5 meters above the surface of the water. the father dove down 4.74.74, point, 7 meters from the iceberg into the water to catch dinner for his kids. what is the father penguin's position relative to the surface of the water?