Complicated If - && Statement in Java

import java.util.Scanner;
public class abejeroact25 {
public static void main (String[] arg) {
Scanner abejeroact25 = new Scanner(System.in);

int grade1;
int grade2;
int grade3;
int grade4;
int grade5;
int sum;
System.out.println("Enter the value for Grade1");
grade1 = abejeroact25.nextInt();
System.out.println("Enter the value for Grade2");
grade2 = abejeroact25.nextInt();
System.out.println("Enter the value for Grade3");
grade3 = abejeroact25.nextInt();
System.out.println("Enter the value for Grade4");
grade4 = abejeroact25.nextInt();
System.out.println("Enter the value for Grade5");
grade5 = abejeroact25.nextInt();
sum = grade1+grade2+grade3+grade4+grade5;
int ave;
ave = sum/5;
System.out.println("Average of the Student\t" +(ave));

if (ave<75)
{
System.out.println("Failed");
}
if ((ave>=75) && (ave<=85))
{
System.out.println("Satisfactory");
}
if ((ave>=85) && (ave<=90))
{
System.out.println("Very Satisfactory");
}
if ((ave>=90) && (ave<=100))
{
System.out.println("Outstanding");
}
if (ave>100)
{
System.out.println("Invalid Input");
}

}
}