Deep Drawing Operation in Number of Stages

Q. A cup of 12 mm height and 6 mm diameter is to be made from a sheet metal of 2 mm thickness. The diameter of cup after third draw reduction will be:
By assuming successive possible reductions of 50%, 30% and 25%.

1. 9 mm
2. 6.30 mm
3. 4.73 mm
4. 3.97 mm