1.1. Seven friends decide to see how long they can hold their breath underwater. Their times, in seconds, are shown below.

                59          72          69          105           77          81          92

Write down the

(i) median, Q_2,

(ii) lower quartile, Q₁,

(iii) and the upper quartile, Q₃,

of the data.

1.2. Find the interquartile $(IQR)$ of the data.

1.3. An outlier is defined as any value $x$ such that

      $x<{Q}_{1}-1.5\timesIQRorx>{Q}_{3}+1.5\timesIQR$

Find the boundaries that determine outliers for the data.