3.2 Show that a 3 £ 5 MA is equivalent to a 7-term weighted moving average with weights of 0.067, 0.133, 0.200, 0.200, 0.200, 0.133, and 0.067.

3.3 For quarterly data, an early step in seasonal adjustment often involves applying a moving average smoother of length 4 followed by a moving average of length 2.