Questions: a. Estimate the mean of ?Yt.
b. Express the mean growth rate in percentage points at an annual rate. [Hint Multiply the sample mean in (a) by 4001
c. Estimate the standard deviation of ?Yt. Express your answer in percentage points at an annual rate.
d. Estimate the first four autocorrelations of ?Yt. What are the units of the autocorrelations (quarterly rates of growth, percentage points at an annual rate, or no units at all)?