Write me a C code if you know C language well !!

I need someone who has experience with C programming and do this 5 simple tasks for me. 1. Write a C program that accepts an integer between 1 to 20 (both inclusive) as input from the user and computes the sum of all numbers that are divisible by the input number in the range 1 to 100 (both inclusive). Also, print all numbers that are divisible by the input number. Please comment your code well. 2. Write a program in C that accepts ten integers from the user and stores them in an array and then counts the frequency of each integer appearing in the array. Please comment your code well. 3. Write a program in C that accepts an input string from the user and counts the total number of alphabets, digits, and special characters in the input string and displays the output. Please comment your code well. 4. Write a program in C that accepts ten integers from the user and stores them in an array and then computes the sum of all elements of the array using pointers. Please comment your code well. 5. Write a program in C that accepts ten integers from the user and stores them in an array and then sorts all elements of the array using pointers. Please comment your code well. Instructions: 1. Use meaningful variable and method names. 2. Comment your code at program, method, and instruction-level (only for non-trivial instructions). 3. Zip all .c files (five .c files in this case) and send them to me.