#include <bits/stdc++.h>
#include <string>
#define ft first
#define sc second
#define pt(sth) cout << sth << "\n"
#define chmax(a, b) (a)=max(a, b)
#define chmin(a, b) (a)=min(a, b)
#define moC(a, s, b) (a)=((a)s(b)+MOD)%MOD
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
static const ll INF=1e18;
static const ll MAX=101010;
static const ll MOD=1e9+7;


/*
 for(i=0; i<N; i++)
   cin >> a[i];
*/


ll moP(ll x, ll n) {
  ll res=1;
  while(n>0) {
    if(n&1) moC(res, *, x);
    moC(x, *, x);
    n>>=1;
  }
  return res;
}

int main(void) {
  ll i, j, k;
  
  ll N, M, K, p, q;
  cin >> N >> M >> K >> p >> q;
  ll a[MAX];
  
  for(i=0; i<N; i++) cin >> a[i];
  
  ll ans=0;
  
  ll T=moP(1-p*2%MOD*moP(q, MOD-2)%MOD, K); //(1-2p/q)^K
  
  ll A=(1+T)%MOD*moP(2, MOD-2)%MOD;     //(1+T)/2
  ll B=(1-T+MOD)%MOD*moP(2, MOD-2)%MOD; //(1-T)/2
  
  for(i=0; i<M; i++) moC(ans, +, a[i]*A%MOD);
  for(i=M; i<N; i++) moC(ans, +, a[i]*B%MOD);
  
  pt(ans);
  
}