#include <bits/stdc++.h>   using namespace std;   int main() {     long long test;     cin >> test;     while (test--) {       long long b, p, f, h, c;       cin >> b >> p >> f >> h >> c;       long long profit = 0;       if (h > c) {         if (b - 2 * p >= 0) {           profit += p * h;           b = b - 2 * p;           if (b - 2 * f >= 0) {             profit += f * c;           } else {             profit += c * (b / 2);           }         } else {           profit += h * (b / 2);         }       } else {         if (b - 2 * f >= 0) {           profit += f * c;           b = b - 2 * f;           if (b - 2 * p >= 0) {             profit += p * h;           } else {             profit += h * (b / 2);           }         } else {           profit += c * (b / 2);         }       }       cout << profit <<   n ;     }   }   