C program writing a code

1-Create a header file that will do (code 1) . With this header file, rewrite your whole script 2-Do (code 3) with User defined function that will take argument and return value (the result) . 3- Create a script with user defined function that will find the determinant of any square matrix as long as the size of the matrix is less than or equal to 4. (i.e. determinant of n X n matrix with n ≤ 4). (If you are not familiar with those terminology, do some google search.) Here are conditions -The User should be prompted each time when a numerical input is needed. -The calculation of matrix determinant has to be done in the user defined function. -You need to write DETAILED comment on this scrip