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please do the steps in this format:

1. A electronic store wants to forecast its weekly sales. Historical data (in dollars) for fifteen weeks are shown below and can be found in the Excel worksheet Excel. 1. Use data to answer the following questions: Excel 1. a) Plot the data and provide insights about the time series. b) What is the forecast for week 16 , using a 2 (3)-period moving average? c) Which one is the best model? d) Find the best exponential smoothing model by evaluating the MSE for from 0.1 to 0.9 in increments of 0.1. e) Find the optimal for MSE, MDA and MAPE Exponential Smoothing Foreoasting Enter data only in yellov cells. Finding optimal Alpha