Please help.

Here is a sample data set.

494.3	565.1	411	462.3	484.3	464.9
335.8	526.4	247.9	268	173.5	423.7
452	437.5	499.8	411.7	381	559.6
535.2	484.1	452.8	126.7	517.7	441.1
446.9	475.5	212.3	374.7	480.4	368.9
341.5	484.3	463.5	484.3	469.4	488.9
368.9	440.2	501.8	564.3	424.5	368.9
463.6	452	186.7	207.8	362.3	460.3
221.4	406.6	530.8	505.3	126.6	479

Find the first quartile for this data set.

Q₁ =

Find the third quartile for this data set.

Q₃ =

Find the interquartile range for this data set.

IQR =