Java exercise- family member : Hello my friends first of all sorry for my english :)

I hang out in a question.

I write a program that gives the how type of family members.

forexample ; 0-3 age -baby 3-12-child 12-31 young etc. for this I used "if"

this is my code ;



       Scanner keybord = new Scanner(System.in);
		int age = klavye.nextInt();
        age =klavye.nextInt(); 
        age =klavye.nextInt();
        
		int count = 0, count1 = 0, count2 = 0, count3 = 0, count4 = 0;

		System.out.println("Enter the age of the family member : ");
        
		if (age >= 0 && age <= 3);
			count++;
			
		if(age >=4 && age <= 12);
			count1++;
		
		if (age >= 13 && age <= 30);
			count2++;

		if (age >= 31 && age <= 49);
		count3++;

		if (age >=50 && age <= 120);
			count4++;

			System.out.println(count+" "+ count3); // this to try to work "count" 

when i write 3 times "49" i want show count3 = 3 but showed just 1.

Where is the problem ?
