答案给错了吧？

问题如下：

c. Calculate the time series for the following ARMA(1,1) model, taking $\epsilon_0 = 0, q_0 = 0, \eta = 0.5, and \phi = \theta = 0.375$

选项：

解释：

$q_t=n+\phiq_{t-1}+\theta\epsilon_{t-1}+\epsilon_t$

Each value is generated via the formula:

q1 = 0.5 + 0.375 * 0 + 0.375 * 0 - 0.58 = -0.08

z2 = 0.5 + 0.375(-0.08) + 0.375(-0.58) + 1.62 = 1.87

and so forth.