need some help solving. When is says models coefficients, what model is it referring to?

4. You are given PACF for a stationary process: $11 = -0.60, $22 = 0.36, Okk = 0 for k 2 3. What time series model could have this PACF? Identify model's coefficients and write model equation. Hint: . $6 of Lecture Notes and slides 32-33 of Week 3 provide relationship between PACF and ACF, allowing to calculate ACFs of the model from given PACFs