How do I use arrays to do this

Program2 Write a Java class called GradeSummary. In the mail method, there is an array of grades: int[] grades (23, 45, 67, 89, 100); Write methods to do the following: Find the minimum grade. The method signature is: static int minGrade(int [ grades) Find the maximum grade. The method signature is: static int maxGrade(int [] grades) 1. 2. Write code in your main program to call these two methods and print out the results. Note: you must have methods to do this calculation. Do not do the calculation in the main method! The main method will just print out the result