(A) Find the average rate of change of the area of a circle with respect to its radius [math] as [math] changes from

(i) 2 to 3 [math] Average rate of change =

(ii) 2 to 2.5 [math] Average rate of change =

(iii) 2 to 2.1 [math] Average rate of change =

(B) Find the instantaneous rate of change when [math] = 2 .
Instantaneous rate of change =