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Individual problem: ARMA(p,q) Consider an ARMA process whose AR polynomial is o(z) = 1 - 22/4 and whose MA polynomial is 0(z) = 1 + z/3. Complete the following: . Factor the AR and MA polynomials. . Determine whether or not o(z) and 0(z) share common factors. . For the ARMA(p,q) process corresponding to o(z) and 0(z), what are p and q? . Is the ARMA(p,q) process corresponding to o(z) and 0(z) invertible? Justify your answer. . Is the ARMA(p,q) process corresponding to o(z) and 0(z) causal? Justify your