Please help me develop a step by step guide of which tools to use in excel and how to use them. This question is for an accounting expert or a data analyis expert that uses excel. The prompt is$,$ You are working as an analyst for a company, which produces robots and Artificial Intelligence$-$based products. Forecasting the prices for recycling materials is very critical for the company. You have been tasked with developing forecasts for National Average price of Plastics Commingled $($$$/$Ib$)$ using the data provided below.

The images provided show the beginning and end of the data and how it is currently gathered in excel.

What needs to be solved: Please develop a forecast for the periods $288$ and $289$ using the two methods, we have just discussed:

$1)$ FORECAST LINEAR$()$

$2)$ FORECAST SHEET $($which essentially uses FORECAST.ETS $-$ exponential smoothing technique$-)$

Please make sure to define the upper and lower limits of your forecasts.