solve those by using file,structure in C language (urgent please) . thank you

Q.1) Take 10 Employees' names, IDs, Salary from user input. Write all name in name.txt, Id in id.txt, and Salary in salary.txt Now read all information from those text files, and write Highest paid employee name, id, salary in Highest.txt. Q.2) Read 15 integer Numbers from user input. Write all numbers in all.txt, All even number in even.txt, Odd in odd.txt. Now read all even and odd from those Text files and print in the console screen Q)3 |Create an employee structure with their name, id, salary, designation. Take ten employees' information from user input using that structure. Find the name, id, designation of an employee who gets a 15000-23000 salary. Write all information in a text file