The monthly sales (in hundreds of dollars) of a company are listed below.

Month	Sales ($100s)
January	12,354
February	13,657
March	14,536
April	13,478
May	16,590
June	19,790
July	17,987
August	18,657
September	19,765
October	18,678
November	20,678
December	23,675

a. Construct a time series plot. What type of pattern exists in the data?

b. Use simple linear regression analysis to find the parameters for the line that minimizes MSE for this time series.

c. What is the sales forecast (in hundreds of dollars) for next month?