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

void Z()
{
    int n, k;
    cin >> n >> k;
    vector<int> a(n);
    ll sum = 0;
    for (int i = 0; i < n; i++)
    {
        cin >> a[i];
        sum = sum + a[i];
    }
    for (int i = 0; i < n; i++)
    {
        double ans = a[i] * 1.0 + a[i] * 1.0 * k  / sum;
        cout << ans << " ";
    }
    cout << "\n";
}

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout << fixed << setprecision(15);

    int t = 1;
    cin >> t;
    while (t--)
    {
        Z();
    }
    return 0;
}