I need answers for a, b, c, d, e as shown in picture 2 for problem in picture 1 as i got picture 2 incorrect.

Consider the supply chain illustrated below: Manufacturer Distributor Wholesaler Retailer Last year the retailer's weekly variance of demand was 190 units. The variance of orders was 490, 600, 770, and 1,300 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.) Consider the supply chain illustrated below: Manufacturer Distributor Wholesaler Retailer Last year the retailer's weekly variance of demand was 220 units. The variance of orders was 490, 610, 770, and 1,300 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 2.22. (Enter your response rounded to two decimal places.) b) The bullwhip measure for the wholesaler is 1.24. (Enter your response rounded to two decimal places.) c) The bullwhip measure for the distributor is 1.26. (Enter your response rounded to two decimal places.) d) The bullwhip measure for the manufacturer is 1.69.(Enter your response rounded to two decimal places.) e) In this supply chain, the retailer appears to be contributing the most to the bullwhip effect