After running the code
ANS is 3 6 which u can see in given image
(NOTE : X represents base value)
for given 3d array have a 2*3 element in each layer
means each plane have total 6 element which means for a[1] have value X+6*2=X+12
and for a[0]=X+0*2=X;
similar for a[1][0] and a[0][0]
a[1]-a[0] = (X+12-X)/4(size of row which have 2 element) = 3
a[1][0]-a[0][0] = (X+12-X)/2(size of each element) = 6