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Problem 5 The daily log price series of mllk traded at NZX {LogPtl ls tested for stationarlty using the Dicker Fuller test. Following results are available. Coefficients Standard Error Intercept 0.01512 0.010135 LogP_L1 -0.00122 0.001055 a] Test whether the log price series is a unit root process or not at 5% level of significance. b) Explain how to find the order of the integration ofthe above-mentioned log price series