A cylindrical disk has volume 8.97 103 m3 and mass 8.16 kg. The disk is floating

Question:

A cylindrical disk has volume 8.97 × 10−3 m3 and mass 8.16 kg. The disk is floating on the surface of some water with its flat surfaces horizontal. The area of each flat surface is 0.640 m2.(a) What is the specific gravity of the disk?
(b) How far below the water level is its bottom surface?
(c) How far above the water level is its top surface?