HELP! QUESTION IS ATTACHED BELOW.

Answer:
Step-by-step explanation:
The radius of the smallest circle is 2 as per the given equation.
The radius of the second circle is 2√2 as the half-diagonal of the square with side of 2.
The radius of the largest circle is 2√2*√2 = 2*2 = 4 units (same logic as above)
The equation for the largest circle is: