the mean sales of 4 quaters ---- seasonal index=quaterly average/mean sales of all quaters

Assume that estimated sales for the first two quarters of Year 2020 (thousand) are as follow; Year 2020, Q1 = 178 Year 2020, Q2 = 205 1. Calculate seasonally adjusted sales data for all quarters. (3 %) 2. Calculate MAPE for each year. (2%) 3. Forecast sales for each quarter (10 %) by using: 3.1 Naive Approach 3.2 Three-period Moving Averages REMARK: Show detail calculation with formula to earn full grade. Assume that estimated sales for the first two quarters of Year 2020 (thousand) are as follow; Year 2020, Q1 = 178 Year 2020, Q2 = 205 1. Calculate seasonally adjusted sales data for all quarters. (3 %) 2. Calculate MAPE for each year. (2%) 3. Forecast sales for each quarter (10 %) by using: 3.1 Naive Approach 3.2 Three-period Moving Averages REMARK: Show detail calculation with formula to earn full grade