In this task, you need to answer the given multiple-choice question on the physics. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.
Q: Problem: a hemispherical bowl is made of 0.5 cm thick steel . inner radius of the bowl is 4 cm . the volume of steel used in making the bowl is
Options: ['a ) 55.83 cm 3', 'b ) 56.83 cm 3', 'c ) 113.67 cm 3', 'd ) 58.83 cm 3', 'e ) none of these']
A:
b