Data set books contains the daily sales of paperback and hardcover books at the same store. The task is to forecast the next four days’ sales for paperback and hardcover books. a. Plot the series and...

Data set books contains the daily sales of paperback and hardcover books at the same store. The task is to forecast the next four days’ sales for paperback and hardcover books.

a. Plot the series and discuss the main features of the data.

b. Use the ses() function to forecast each series, and plot the forecasts.

c. Compute the RMSE values for the training data in each case.