The following table shows median weekly earnings for men and women of different ages in 2012.
(a) Use the data to make a 2 × 4 matrix with each row representing a gender and each column representing an age category.
(b) If union members' median weekly earnings are 20% more than the earnings given in the table, use a matrix operation to find a matrix giving the results by sex and age for union members?

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Age 25-54 55-64 16-24 460 409 65+ Men Women 902 722 1015 760 780 661