Your friend Stephano claims that he can predict the sales at your new ice cream store using a process that he calls “temporal temperature intuition.” Your sales for the first four days are $1000, $1100, $1600, and $1100. Stephano’s predictions for those four days were $1100, $1500, $1500, and $1300. Compute his R-squared in order to determine whether his model is GOOD or NO GOOD.