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∇{res}←Trabb;f;S;i;a;y⍝ define a function Trabb
f←{(0.5*⍨|⍵)+5×⍵*3}⍝ define a function f
S←,⍎{⍞←⍵⋄(≢⍵)↓⍞}'Please, enter 11 numbers: '
:Foria:InEach(⌽⍳≢S)(⌽S)⍝ loop through N..1 and reversed S