From a uniform disc of radius R and mass M two small discs of radius R/4 is being cut as shown in figure. Find the moment of inertia of the system about axis $\mathrm { AA } ^ { \prime }$.
(A) $\frac { \mathbf { 7 9 } } { \mathbf { 1 2 8 } } \mathbf { M R } ^ { \mathbf { 2 } }$
(B) $\frac { 79 } { 256 } \mathrm { MR } ^ { 2 }$
(C) $\frac { 109 } { ( 56 ) } \mathrm { MR } ^ { 2 }$
(D) $\frac { 109 } { 128 } \mathrm { MR } ^ { 2 }$