write a c code:

ISBN-13 is a standard for identifying books. It uses 13 digits

ISBN-13 Format	d1	d2	d3	d4	d5	d6	d7	d8	d9	d10	d11	d12	d13
Example	9	7	8	0	1	3	2	1	3	0	8	0	6

The last digit d₁₃ is a checksum, which is calculated from the other digits using the following formula:

10 - (d₁ + 3d2 + d₃ + 3d₄ + d₅ + 3d₆ + d₇ + 3d₈ + d₉ + 3d₁₀ + d₁₁ + 3d₁₂)%10

If the checksum is 10, replace it with 0.

1. Write a function named readString that takes only an array of character as parameter named data, reads a string of size 13 from the user, and sore it the array data. The function should ask the user to enter a proper string of until the user enters a string of size 13

2. Write a function named checkSum that takes only one input parameters str of type char* (null-terminated C strings of characters) and calculates and returns the check sum from the first 12 digits

3. Write the main function that

• Prints your full name and Student ID
• Define a proper variable to store a c-string
• Properly call the function readString to read a 13-digit ISBN
• Displays valid ISBN if the digit 13 equals the checksum calculated in part2 or invalid otherwise

4. Add your name, your University ID number and section number as a comment at the beginning of this program.

Sample Run:

Name: khaled abdullah

ID:1122333

Please Enter a 13 Digit ISBN:9780132130806

9780132130806

Valid ISBN