6. Given the following data: ,0.5, 1.25,0.8,0.4,-0.3,-0.9,-1,-1.5,-0.9,0.65 (a) Estimate the mean, variance and the first two autocorrelation values for this data. (b) Determine the first and second order LMMSE predictors for this data. (First order: [n]=aix[n-1] and second order predictor: [n] = bix[n-1]+b2x[n-2]) (c) Determine the minimum mean square error for these predictors.