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.
4, 8, ['f', 'B', 'Z', 'Q', 'f', 'q', 'm', '6069', 'Z', 'z', '7813', 'z', '241', '7789', 'E', '8879', '3137', 'G', '699', '5773', 'Y', 'S', '1621', '1687']