#include<bits/stdc++.h>
using namespace std;
typedef long long LL;
typedef double db;
#define V vector
#define pb push_back
int main() {
    cout << fixed << setprecision(15);
    ios::sync_with_stdio(0), cin.tie(0);
    int t; cin >> t;
    while(t--) {
        db n; cin >> n;

        db a, v1, b, v2; cin >> a >> v1 >> b >> v2;

        if(a > b) swap(a, b), swap(v1, v2);

        db l = a, r = b;
        auto cal = [&](db x) {
            return max(min((a + (x - a) * 2) / v1, ((x - a) * 2 + a) / v1), min(((n - b) + (b - x) * 2) / v2, ((n - b) * 2 + (b - x)) / v2));
        };
        for(int i = 1; i <= 200; i++) {
            db mid1 = l + (r - l) / 3;
            db mid2 = l + (r - l) * 2 / 3;
            if(cal(mid1) > cal(mid2)) l = mid1;
            else r = mid2;
        }

        cout << min({
            (n + (n - b)) / v2, 
            (n + b) / v2, 
            (n + a) / v1, 
            (n + (n - a)) / v1,
            (n + a + (n - b)) / (v1 + v2),
            max(a / v1, (n - a + (n - b)) / v2),
            max((n - b) / v2, (n - (n - b) + a) / v1),
            max((n - a) / v1, (n - (n - b)) / v2),
            max(a / v1, ((b - a) * 2 + (n - b)) / v2),
            max((n - b) / v2, (a + (b - a) * 2) / v1),
            2 * (b - a) / (v1 + v2) + max(a / v1, (n - b) / v2),
            cal(l)
        }) << endl;

        // cout << l << endl;

        // cout << cal(l) << endl;
        // cout << cal(2300) << endl;
    }


}