Test your brain and answer the question

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?

Bring the fraction a/a-4 to a denominator of 16-a^2

Given abc find the values of x and y. in your final answer, include all of your calculations.