The magnitude of Fourier transform X(ω) of a function x(t) is shown below in figure (a). The magnitude of Fourier transform Y(ω) of another function y(t) is shown in figure (b). The phases of X(ω) and Y(ω) are zero for all ω. The magnitude and frequency units are identical in both the figures. The function y(t) can expressed in terms of x(t) as

• A. \(\frac{2}{3}x\left( {\frac{t}{2}} \right)\)
• B. \(\frac{2}{3}x\left( {2t} \right)\)
• C. \(\frac{2}{3}x\left( {t} \right)\)
• D. \(\frac{3}{2}x\left( {\frac{t}{2}} \right)\)