Suppose that a continuous-time signal xc(t) (−[infinity]x[n]=
3 for n = -1
12​ for n = 0
−1 for n = 1
0 otherwise
where the n=0 sample corresponds to t=0. Let xr(t) be the recovered continuous-time signal when we apply sinc interpolation to x[n].
Write an equation for xr(t) that corresponds to the x[n] above.