In a box plot of a dataset with $n = 500$ observations, the interquartile range (IQR) is $20$. A data point $x_i$ is classified as an outlier if $x_i < Q_1 - 1.5 \times \text{IQR}$ or $x_i > Q_3 + 1.5 \times \text{IQR}$. If $Q_1 = 40$ and $Q_3 = 60$, which of the following values are considered outliers?