Joker Party Supply Has the Following Sales History for Its

Joker Party Supply has the following sales history for its most popular product.
$$\begin{array} { | c | c | c | c | c | c | } \hline & \begin{array} { c } \text { Week } \\\mathbf { 1 }\end{array} & & \begin{array} { c } \text { Week } \\\mathbf { 2 }\end{array} & & \begin{array} { c } \text { Week } \\\mathbf { 3 }\end{array} \\\hline \text { Monday } & 6 & \text { Monday } & 12 & \text { Monday } & 8 \\\hline \text { Tuesday } & 8 & \text { Tuesday } & 10 & \text { Tuesday } & 9 \\\hline \text { Wednesday } & 15 & \text { Wednesday } & 18 & \text { Wednesday } & 17 \\\hline \text { Thursday } & 23 & \text { Thursday } & 22 & \text { Thursday } & 25 \\\hline \text { Friday } & 35 & \text { Friday } & 39 & \text { Friday } & 42 \\\hline \text { Saturday } & 28 & \text { Saturday } & 26 & \text { Saturday } & 30 \\\hline \text { Sunday } & 10 & \text { Sunday } & 11 & \text { Sunday } & 9 \\\hline\end{array}$$ Given the obvious seasonality, calculate the forecast for Thursday, Friday, and Saturday of week 4.