please explain step by step on excel

Mt. Bear is a ski resort in California. Many guests visit there; however, most of them come in the winter season because of the phenomenal skiing. A group of hotels has analyzed their demand for the last three years (see the table below). Year Quarter Demand 2018 2019 119,000 21 14,900 31 13,700 4 22.100 11 18,700 2 17,000 31 16,500 4 20,100 119,700 2 12,100 31 13,200 4 23.400 2020 Using a smoothing parameter of 0.3 and an initial forecast of 18,000, forecast demand for the first four quarters in 2021. - If you use Excel spreadsheet in your problem-solving, you must submit screenshots or scans or photos of your Excel spreadsheet