patterns - the 17 year cicadas reappears every 17 years. Suspose the cicadas appeared in a town in 1963. a) write a sequence based on the years in which cicadas will appear starting with 1963. b) use the variables FIRST NEXT and PRIEVIOUS to write two equations that define the sequence. c) is your sequence arithmetic? d) using a graghic calcilator, use it to generate the sequence