In figure a spherical part of radius 𝑅/2 is removed from a bigger solid

In figure a spherical part of radius 𝑅/2 is removed from a bigger solid

In figure a spherical part of radius 𝑅2 is removed from a bigger solid sphere of radius R. Assuming uniform mass distribution, shift in the centre of mass will be (a) 𝑅/7 (b) 𝑅/14 (c) 𝑅/9 (d) 𝑅/3