TASK DEFINITION: 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 return the sum of all the numerical elements in the list A between the positions i and j (including positions i and j). Return 0 if no numerical element is present in the list between the given ranges. 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.
PROBLEM: 6, 9, ['8047', 'Q', 'A', '2811', '8953', 'P', '4515', 'f', 'K', 'u', 'g', 'R', 'p', '667', '8703', '2903', '6299', '417', '3317', 'O', 'z', '3507', '8969', '6193', '2549']

SOLUTION: 4515

PROBLEM: 8, 12, ['v', 'N', '8123', '1677', '5743', '8657', 'S', '5073', 'Y', 'R', '2781', '6583', 'A', '1989', 'S', '9301', 'y', 'j', '1759', 'U', '9951', 'W', '5967', 'a', 'c']

SOLUTION: 14437

PROBLEM: 4, 13, ['4349', '3601', 'Y', '2417', '3011', '8281', 'G', '7481', '11', '7479', '5633', '6643', '4037', 'n']

SOLUTION:
44993