(A)Is This Time Series Random? Perform a Runs Test and Compute

(A)Is this time series random? Perform a runs test and compute a few autocorrelations to support your answer.
(B)Does a linear trend appear to fit these data well? If so,estimate the linear-trend model for this time series,and interpret the value.
(C)Is there evidence of some seasonal pattern in these sales data? If so,characterize the seasonal pattern,and explain how to forecast future values.