When smoothing time series data, it is sometimes advantageous to give decreasing amount of weights to values farther away from the center. Consider the simple two sided moving average smoother of the form (wt1 + 2w: + WHO/4, where {wt }are independent with mean zero and variance 02. Determine the autocovariance and autocorrelation functions as a function of lag h, and sketch the ACF as a function of h