In a box plot of a dataset with $n=400$ observations, the interquartile range (IQR) is $24$. If the first quartile $Q_1 = 30$ and the third quartile $Q_3 = 54$, a data point $x_i$ is classified as a potential outlier if $x_i < Q_1 - 1.5 \times \text{IQR}$ or $x_i > Q_3 + 1.5 \times \text{IQR}$. Which of the following values are considered potential outliers?