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]: 2, 4, ['v', '807', 'C', 'n', '7213', 'l', '5943']
[EX A]: nC807

[EX Q]: 7, 7, ['L', 'N', 'k', '4239', '9509', 'B', '875', '8169', '5417', 'N']
[EX A]: 875

[EX Q]: 4, 6, ['4469', 'T', '2319', 'p', 'E', '6849']
[EX A]:
6849Ep