Solve the system of equations solve for Y

If m 17 27 90 63 ** picture is attached

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

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?