A finite-length signal x[n] is nonzero in the interval 0 ? n ? 19. This signal is the input to the system shown in figure, where the output of the system, y[n], for the interval n = 19 ?.. 28 can be expressed in terms of the DTFT X(e ^j?) for appropriate values of ?. Write an expression for y[n] in this interval in terms of X(e ^j?).

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ei(2x/21)(n-19)/2. n= 0, 1. .... 28, h[n] = otherwise. W = e i(2n/21) h[n] x[n] y[n] e-1(2m/7)nwn212 w(n- 19)212