A. 1. Define an Employee structure that has members last name, first name, title, and salary. 2. Write a program that prompts the user for an arbitrary number of Employees, and stores them in an array of Employee. When the user enters an empty string for the last name, print out the list of Employees. B. Split the previous program (Employee - Section A) into three files: employee.h, employee.c, lab6.c. C. employee.h declares 3 functions as follow: Exercise employee.h /* employee.h */ /* addEmployee reads each field from standard. input into the next available Employee slot, * as in the exercise in the previous section. * It returns the index of the Employee just added, or -1 if the array is full */ int addEmployee (void); /* printEmployee also returns the index of the * Employee just printed, or -1 if the index i * is invalid */ int printEmployee (int i); /* Does what it says: */ int numEmployees (void); D. You need to provide employee.c, which will contain the Employee structure definition and any needed private data, and the implementation of the functions declared in employee.h. Exercise lab6.c /* lab6.c */ #include "employee.h" #include int main() { int i; /* Fill Employee array: */ while (addEmployee () != -1) ; /* Print each Employee: */ for (i = 0; i < numEmployees (); ++i) { printEmployee (i); putchar ('\n'); } return 0; use (c) language