Untitled

#include <bits/stdc++.h>
using namespace std;

const long long MOD = 1000000007;

int main() {
    int t;
    cin >> t;
    while (t--) {
        int n;
        long long k;
        cin >> n >> k;
        vector<long long> arr(n);
        for (int i = 0; i < n; i++) {
            cin >> arr[i];
        }

        sort(arr.begin(), arr.end());

        while (k--) {
            arr[0] *= 2;
            sort(arr.begin(), arr.end());
        }

        long long sum = 0;
        for (int i = 0; i < n; i++) {
            sum = (sum + arr[i]) % MOD;
        }

        cout << sum << endl;
    }
    return 0;
}