In this task, you are given inputs i, j, and A, where i and j are integers and A is a list. You need to find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output the resultant string. i and j will be non-negative, and will always have a value less than the length of A. i will always be less than j. Perform the operations in order, i.e., do not concatenate the elements and then reverse the string.

[EX Q]: 1, 3, ['Y', 'k', 'P', '1517', 'z', '8727', 'U']
[EX A]: PkY

[EX Q]: 2, 3, ['I', '301', '981']
[EX A]: 981301

[EX Q]: 6, 7, ['7127', 'R', '2013', '1687', 'i', 'q', '1917', '5097', 'q', '4387']
[EX A]:
1917q