Write a C program with the following specifications : Write the definition of a structure named employee that contains character array members for an employee's first and last names of size 20, an int member for the employee's age, a char member that contains 'M' or 'F' for the employee's gender, and a double member for the employee's hourly salary. Using the above-mentioned definition, write a C program that asks a user to enter the values of 20 employees and save them in an array of employees. . Hint: To define an array that contains 20 elements of type 'struct employee', you just need to write: struct employee employees[20]; . Modify your program to include a function, which calculates the average salary of all employees. The function takes as input the array of all employees and returns the average salary as float value. Modify you program to include a function that take the array of all employees as input and return the employee record with the youngest age. If there is more than one employee with the same youngest age, the program should return one of them. Modify your program to include a function that take the array of all employees as input and sort it in an ascending way according to the employee age. There is no need for a return value to the function, but somehow the result must be assigned to the caller. Modify your program to include a function, which prints all the content of the employees array. The array of all employees acts as input and there is no return type of this function