Two thin uniform rings made of same material and of radii `R` and `4 R` are joined as shown. The mass of smaller ring is `m`. Find the `M.I.` about an axis passing through the center of mass of system of rings and perpendicular to the plane.

Explanation

To find the Moment of Inertia (M.I.) about an axis passing through the center of mass of the system of two rings, we will follow these steps:

### Step 1: Identify the properties of the rings
- We have two rings:
- The smaller ring has a radius \( R \) and mass \( m \).
- The larger ring has a radius \( 4R \).

### Step 2: Calculate the mass of the larger ring
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