I'm lost, please help

Problem 4. PepsiCo Quarterly Revenue figures are given for the years 2019 - 2021 and the first two quarters of 2022. Their revenue is seasonal and this table provides the revenue in the original seasonal amount and then deseasonalized using a seasonal relative. Use the above data to calculate the forecasted deseasonalized and seasonal revenue for time t= 15 and time t=16. You will find the M2 Seasonal Demo video in Module 2 extremely helpful in solving this problem. 4.1 Enter the values for t=15 and 16 , up to 3 decimals only. ( 20 points)