/* -*- coding: utf-8 -*-
 *
 * 995.cc:  No.995 タピオカオイシクナーレ - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int MAX_N = 100000;
const int MOD = 1000000007;

/* typedef */

typedef long long ll;
typedef int vec[2];
typedef vec mat[2];

/* global variables */

int bs[MAX_N];
mat ma, mb, mc;

/* subroutines */

inline void initmat(mat a) { memset(a, 0, sizeof(mat)); }
inline void unitmat(mat a) { initmat(a); a[0][0] = a[1][1] = 1; }
inline void copymat(const mat a, mat b) { memcpy(b, a, sizeof(mat)); }

inline void mulmat(const mat a, const mat b, mat c) {
  c[0][0] = ((ll)a[0][0] * b[0][0] % MOD + (ll)a[0][1] * b[1][0] % MOD) % MOD;
  c[0][1] = ((ll)a[0][0] * b[0][1] % MOD + (ll)a[0][1] * b[1][1] % MOD) % MOD;
  c[1][0] = ((ll)a[1][0] * b[0][0] % MOD + (ll)a[1][1] * b[1][0] % MOD) % MOD;
  c[1][1] = ((ll)a[1][0] * b[0][1] % MOD + (ll)a[1][1] * b[1][1] % MOD) % MOD;
}

inline void powmat(const mat a, ll b, mat c) {
  mat s, t;
  copymat(a, s);
  unitmat(c);

  while (b > 0) {
    if (b & 1) {
      mulmat(c, s, t);
      copymat(t, c);
    }

    mulmat(s, s, t);
    copymat(t, s);
    b >>= 1;
  }
}

int powmod(int a, ll n) {  // a^n % MOD
  int pm = 1;
  while (n > 0) {
    if (n & 1) pm = (ll)pm * a % MOD;
    a = (ll)a * a % MOD;
    n >>= 1;
  }
  return pm;
}

/* main */

int main() {
  int n, m, p, q;
  ll k;
  scanf("%d%d%lld%d%d", &n, &m, &k, &p, &q);

  for (int i = 0; i < n; i++) scanf("%d", bs + i);

  int iq = powmod(q, MOD - 2);
  int p0 = (ll)(q - p) * iq % MOD, p1 = (ll)p * iq % MOD;
  ma[0][0] = p0; ma[0][1] = p1;
  ma[1][0] = p1; ma[1][1] = p0;
  powmat(ma, k, mb);
  int pk0 = mb[0][0], pk1 = mb[1][0];

  int esum = 0;
  for (int i = 0; i < n; i++)
    esum = (esum + (ll)bs[i] * ((i < m) ? pk0 : pk1) % MOD) % MOD;
  
  printf("%d\n", esum);
  return 0;
}