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OCR: (a) y = Ayi + Bym+1 + Of + Dy, (c) )YH-Y (342 -1)(841-X)27 +1(3B2 -1)(41-X1 )94+1 B=1-4 C={(A) - A)(*+1 -3)} (d) a= 3(3:41->) D=[(B3-B)(*)+1 -x}] c=6) ,., - 6y; - (2x41-x7 +2x,xi)); Figure 1: Equations for deriving the algorithm.