The Pancake House Did a Brisk Business on the Weekend

The Pancake House did a brisk business on the weekend and the maître d' was always on the lookout for ways to improve the customer experience. He carefully tracked the number of customers that graced their establishment over the last four weekends. He was hopeful that he could forecast the number of customers that would come for the world's finest pancakes the next weekend.
$$\begin{array} { | l | c | c | c | c | } \hline & \text { Weekend 1 } & \text { Weekend 2 } & \text { Weekend 3 } & \text { Weekend 4 } \\\hline \text { Friday } & 131 & 216 & 286 & 355 \\\hline \text { Saturday } & 225 & 311 & 408 & 490 \\\hline \text { Sunday } & 166 & 249 & 330 & 415 \\\hline\end{array}$$ Using the data in the table, first plot the data and comment on the appearance of the demand pattern. Then develop a forecast for weekend #5 that fits the data.