Option (1) will use a function called displayStudents () called from the main () to display the contents of the studentArray array on the screen in an appropriate format. The displayStudents () function has two parameters: the array and the size of the array. • Option (2) will use a function called calculate Average () which is designed to calculate the average value of all marks in studentArray and return the result to the main() function which will then display it with an appropriate message. This function also has two parameters: the array and the size of the array. • Option (3): Ask if the user wants to sort the students' details with respect to either name or marks. Call appropriate functions to do the same. • Option (4) is to search for a particular student's mark. The function should have three parameters, array, size and the name (a string variable) that the user searching for. This function returns the index of the array if it is found otherwise it returns -1. Display all the details of that student in main function. User should have the options to use either linear search or binary search. • Option (5) will use a function called findMaximum () which is designed to find the largest value of all marks in studentArray and return the result to the main () function which will then display it with an appropriate message. This function has two parameters: the array and the size of the array. • Option (6) will first use a function called updateFile() which will open the file in append mode, prompt the user for new student's name, id and mark, and then write the new data at the end of the file using the same format as the original file. It will then the call the readFile() function used in the beginning of the program again to read the contents of the updated file and repopulate the studentArray. • Option (7) will terminate the program after displaying an appropriate goodbye message.