The cost of computing the Fourier coefficients is ___________ (Note: ‘N’ is the number of grid points).

The cost of computing the Fourier coefficients is ___________ (Note:

1.	The cost of computing the Fourier coefficients is ___________ (Note: ‘N’ is the number of grid points).
A.	N3
B.	N2
C.	\(\frac{N^2}{2} \)
D.	\(\frac{N^3}{3} \)
Answer» C. \(\frac{N^2}{2} \)