```
import acm.program.*;
import acm.util.*;
import java.lang.Math.*;
public class lol extends Program{
public void run () {
int end = readInt("Enter the last number that you want in the range(0, end), it will not be included, end: ");
int flag = isPrime(end);
if (flag == -1) {
println("There is no prime numbers in this range");
} else {
println("Your prime number is: "+ flag);
}
}
public RandomGenerator rgen=RandomGenerator.getInstance();
public int isPrime(int n) {
int temp = rgen.nextInt(n);
for (int i = 2; i <= n; i++) {
if(n % i == 0) {
return temp;
}
}
return -1;
}
}
```

I have to create a class that extends ACM’s `RandomGenerator`

. It has to return a random prime number from a range which is specified by a user. Also these numbers on the given range have to appear with the same odds(for example if there are 4 primes in the range each one must appear with an odd of 25%).

How can this be achieved? (This is a test class not the one of the RandomGenerator)