Pool dive rings

Toss the ring into a pool to help children practice diving skills in a fun and engaging way. The ring contains small air pockets that make one side slightly buoyant. Five embedded US pennies on the opposite side add just enough weight to ensure the ring sinks straight down while remaining vertical. For it to not just sink but sink vertically, it must weigh exactly 50 grams in total, including the coins. Assume that five coins weigh 12.5g. Printing Tip:Pause the print at the appropriate layer and insert five US pennies to achieve the proper balance. Feel free to copy or modify the source:https://cad.onshape.com/documents/ed60f07c313672725ddfa494/w/cab31260417268bce42037fb/e/541b63d85f9aee1682658fb2