#pragma GCC diagnostic error "-std=c++11"
//#include <bits/stdc++.h>
#define _ ios_base::sync_with_stdio(0);cin.tie(0);
#include<iostream>
#include<algorithm>
#include<cstdio>
using namespace std;

const double eps = 1e-8;
const int N= 300 + 5;
struct point{
    double x, y, vx, vy;
    void read(){ cin >> x >> y >> vx >> vy; }
}p[N];
int n;

double dist_points(point p1, point p2, double t){
    double x = (p1.x + t * p1.vx) - (p2.x + t * p2.vx);
    double y = (p1.y + t * p1.vy) - (p2.y + t * p2.vy);
    return sqrt(x * x + y * y);
}

double cal(double x){
    double Max = 0;
    for(int i = 0; i < n; i++)
        for(int j = i + 1; j < n; j++)
            Max = max(Max, dist_points(p[i], p[j], x));
    return Max;
}

double ternary_search(double L, double R){
    if(L > R) swap(L, R);
    while(R - L > eps){
        double mid1, mid2;
        mid1 = (L + R) / 2;
        mid2 = (mid1 + R) / 2;
        if(cal(mid1) <= cal(mid2)) R = mid2;
        else L = mid1;
    }
    return (L + R) / 2;
}
int main(){ _
    int T, Cas = 0;
    cin >> T;
    while(T --){
        cin >> n;
        for(int i = 0; i < n; i++) p[i].read();
        double x = ternary_search(0, 1e8);
        printf("Case #%d: %.2f %.2f\n", ++Cas, x, cal(x));
    }
}