please help out with this problem, thanks in advance!

Centerville Bikes and Stuff (CBS) sclls motorcycles and accessories. The number of helmets sold by CBS per week for the past six weeks follow5. \begin{tabular}{|c|c|c|c|c|c|c|} \hline Week & 1 & 2 & 3 & 4 & 5 & 6 \\ \hline Value & 18 & 11 & 14 & 10 & 16 & 13 \\ \hline \end{tabular} Compute MSE, (Round your answer to two decimal placess.) MSE = What is the forecast for week 7 (c) Use a=0.2 to compute the exponential smoothing values for the time series. Compute MSE, (Round your answer to two decimal places.) MSE = What is the forecast for week 7? (Round your answer to two decimal places.) e) Use a=0.4 to compute the exponential smoothing values for the time series