Given the actual demand for years $\frac{2013}{14},$ calculate the total forecast for year $2015,$ as well as the forecast units for each quarter of ${2015}_{?}.$

$(10$ marks$)$

For your calculations use the principles of trend and seasonality.

List five figures, as follows: Total, Q$1,$ Q$2,$ Q$3,$ Q$4$

$\backslash$table$[[$Quart$.,\backslash$table$[[$Year$],[2013]],\%,\backslash$table$[[$Year$],[2014]],\%,\backslash$table$[[$Year$],[2015]],\%],[1,16,,20,,,],[2,33,,34,,,],[3,58,,70,,,],[4,33,,32,,,],[,,,,,,]]$