(a) Construct a time series plot. What type of pattern exists in the data? The time series plot shows a nonlinear trend. The time series plot shows a seasonal pattern. The time series plot shows a horizontal pattern. The time series plot shows a linear trend. (b) Use simple linear regression analysis to find the parameters for the line that minimizes MSE for this time series. (Round your numerical values to two decimal places.) Yt= (c) What is the forecast for t=8 ? (Round your answer to one decimal place.)