It's not 1.27. get the bullwhip measure for Retailer, Wholesaler, Distributor, and Manufacturer, then figure out which one is the largest contributor to the bullwhip effect

Consider the supply chain illustrated below: Last year the retailer's weekly variance of demand was 210 units. The variance of orders was 510,600,800, and 1,320 units, for the retailer, wholesaler, distributor, and manufacturer, respectively. (Note that the variance of orders equals the variance of demand for that firm's supplier.) a) The bullwhip measure for the retailer is (Enter your response rounded to two decimal places.) b) The bullwhip measure for the wholesaler is 1.27 . (Enter your response rounded to two decimal places.)