please i need help solve it code ARM ASSEMBLY

Instructions: . It should be an Assembly program, written entirely from scratch by you, satisfying the requirements specified below. This assignment is individually work, so every student has to submit his/her own solution and be ready for discussion. It is very important that you write easily readable, well-designed, and fully commented code [You must organize your code using procedures). No late submission will be accepted. Assignment: A - ISBN Checksum Generator Use Keil uvision software to write and simulate an ARM assembly program that generates a valid ISBN checksum for a given ISBN. B - ISBN Checksum Validator Use Keil uvision software to write and simulate an ARM assembly program that checks the validity of a given ISBN by verifying the checksum Helping Information . . . An ISBN consists of nine digits plus a validation digit. The digits are numbered from right to left as d1, d2 ... d10, with d1 being the validation digit. You can define the ISBN number in a 10-byte array in the memory. Each digit is stored byte. To check whether the ISBN is valid or not, the following calculations are performed: . Result = (10 x d10 + 9 x d9 + ... + i x di + ... + 2 x d2) % 11 Calculate d1 = 11 - Result If the calculated d1 equal to the d1 in the input ISBN then it is valid If d1 = 10, it is written 'X' For example, given the following ISBN: ISBN = 5123487654 ISBN = 5 1 2 3 4 8 7 6 5 4 d10 d9d8 d7d6 d5 d4 d3 d2d1 Result = x 10+ x 9 + x 8 + x 7 + x 6 + x 5 + x 4 + x3 + x 2 mod 11 = 216 mod 11 = 7 d1 = 11 - Result = 11-7 = 4 , then the input ISBN is valid, since the calculated d1 is equal to the d1 in the input ISBN. Some ISBN examples: The ISBN 5123487654 is valid The ISBN 5123487658 is not valid The ISBN 7465159237 is valid The ISBN 7465159232 is not valid The ISBN 123456789X is valid The ISBN 1234567891 is not valid