$1.$ Find the missing value $($A$)$ in the table$2.$ Find the average seasonal factor for each of the four seasons $($days$)\mathrm{.}3.$ Make a forecast for Sunday of year $6,$ if total attendance in year $6$ is forecast to be $10,000\mathrm{.}4.$ One of the organizers has questioned the wisdom of giving equal weighting to all five past years $($when calculating the average seasonal factors$),$ and has proposed that only the three most recent years be used, with the most recent year being weighted by $0\mathrm{.}5$ and the other two by $0\mathrm{.}25.$ Discuss your thoughts on this suggestion. $($You may also wish to calculate and compare average seasonal factors and forecasts for year six under each method using all five years, or only using the most recent three years and weighting them as proposed$)$