NEED HELP WITH UML DIAGRAM OR FLOWCHART AND CODE TO RUN PLEASE!!!!!

Problem 3 (35 points). Please use the Problem Solving Process. Include UML Class and Activity Diagrams Write an application that takes in an Array of 30 Grades (integer) and returns the maximum grade, minimum grade, average of all grades, and show the grade distribution (count to get number students getting each grade). You can assume grades are A(90-100), B(80-89), C(70-79) and F(O-69) Note; maximum grade, minimum grade, average grade, and distribution must use implemented as separate methods