I want accurate answer with proper explanation show all your work please

Use the data given below to answer the following question(s). The table provided below gives the sales details of the number of android smart phones at an electronic retail store for the past 6 weeks. The time series appears to be relatively stable, without trend, seasonal, or cyclical effects. The simple moving average value of k is set at 2. Week Units sold 1 88 2 44 3 54 4 65 5 72 6 85 Using the data, determine the value of the simple moving average root mean square error. O 0.21 O 20.12 O 14.39 O 207.13