import java.util.ArrayList;

import java.util.Collections;

import java.util.Scanner;

import static java.lang.Integer.parseInt;

public class mink {

static ArrayList<Long> list1 = new ArrayList<>();

static ArrayList<Long> list2 = new ArrayList<>();

static ArrayList<Long> list3 = new ArrayList<>();

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

String f = sc.nextLine();

int t = parseInt(f);

while(t>0) {

int k = sc.nextInt();

int n = sc.nextInt();

int m = sc.nextInt();

int a = sc.nextInt();

int b = sc.nextInt();

int x = n + m - k;

op(k, n, m, a, b, x);

System.out.println(Collections.min(list3));

list1.clear();

list2.clear();

list3.clear();

t--;

}

}

static void op(long k,long n,long m,long a,long b,long x){

for (long i = a; i <= n; i++) {

list1.add(i);

}

for (long j = b; j <= m; j++) {

list2.add(j);

}

for (long p = 0; p < list1.size(); p++) {

// for (long q = 0; q < list2.size(); q++) {

// if(list1.get(p)+list2.get(q) == x)

// list3.add(list1.get(p)*list2.get(q));

}

}

}