This question and the next four are based on the following information: The file /content/enforced/2258244-WMBA6040Quant-Spring2021-Wang-C95_CO/Moduel 4 Quiz American Express.xlsx contains the daily closing prices of American Express stock for an eight-week period. Using a span of 3, forecast the price of this stock for the next trading day with the moving average method. What is the earliest period to which the moving average model with a span of 3 can be applied