You are tasked with developing a simple grade calculator for a class of students. The program should allow the user $($Tutor$)$ to enter the number of students, input each student's grade, and then calculate the average grade. The program will also display the highest and lowest grades from the class. Requirements: $1.$ User Input: o The user will enter the number of students. o The program will use an array to store each student$$s grade. o After entering the grades, the program will calculate and display the average, highest, and lowest grades. $2.$ Array: o Use an array to store the grades of the students. $53.$ Control Structures: o Use a loop to input the grades into the array. o Use another loop to find the highest and lowest grades. o Perform arithmetic operations to calculate the average grade. Questions: a$)$ Write a java program based on the given scenario. $(10$ Marks$)$ b$)$ Explain how the array is used in this program to store and access student grades. $(5$ Marks$)$ c$)$ What is the purpose of the loop in this program? How is it used to both input and process the grades? $(5$ Marks$)$