Two python code.

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Expected Behavior function concat elementslist startpos ending at position stoppos (inclusive) and returns the resulting string starting at poison stortpos and stop at of Ast t startpos and startposis negotive, concatenation should start with the first element of Bt f stoppos lealBt, concotenation should the last element stopposit the empty string the examples below. Programming Requirements Solve this problem using a koop to iterate over the list. Examples concat elements( dd'1. 1, 3) return value: bbccdd 2. elements CI'aa", bb ce dd 1, -1, 1) return value 'aabb 3, concat. return value: "aabbeedd 4 concat elements (I aa ee dd 1, 3, 3) bb return value: "dd 1) dd 1 concat element retum value