Please explain steps taken

From the data below, calculate the three-day simple moving average. Fill in the "Buy or Sell Signal" column for this trading indicator. Then, calculate the three-day exponential moving average and fill in the "Buy or Sell Signal" column for this trading indicator. Assume that the current closing price will receive 4/5 of the weight in the exponential moving average. Finally, fill in the "Signal Comparison" column. On which days do the signals disagree