Code the following in Python 2.x: upc.py: UPC validation [15 points] UPC-A codes are used on packaging to identify products; when you go to the grocery, the barcode scanned by the cashier is, typically, a UPC-A code. These codes consist of twelve digits, the first eleven of which are the product code, and the last is a check digit, which must satisfy the following equation: ## 1,2,3...12 are subscripts## (3d1+d2+3d3+d4+3d5+d6+3d7+d8+3d9+d10+3d11+d12) mod10=0, where d1d2d3d4d5d6d7d8d9d10d11d12 are the 12 digits of the code (from left to right). It can be shown that the check digit is sufficient to catch and correct and single-digit error (e.g., mis-reading by barcode scanner). Write a function is_upc_valid() that accepts an integer argument representing a possible UPC-A code, and returns True if the code is valid (i.e., its check digit is correct) and False otherwise. You may assume that the argument is non-negative and does not exceed 12 digits (in decimal).

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