Hi! Any ideas how I could write the sinc interpolation using this formula? Thanks!!

The samples f(t_k) are taken from t=kT_s .Assume that only a finite number of signal samples will be nonzero and that the signal must be reconstructed over a finite interval of time. Interpolate a single point of value 1 at t=0 and plot between -5 and 5. Don't know how to start. Thanks!