Tutorial: Answers

1. Recursive: it contains a previous output term, y_n-1
   
2. Order = 1
   
3. y_n / x_n = (2 - z^-1) / (1 - 0.8z^-1)
   
4. y₀ = 10
   y₁ = 35
   y₂ = 28
   y₃ = 8.4
   y₄ = 9.72
   y₅ = 11.776

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