#include<bits/stdc++.h>
using namespace std;
#define rep(i,n) for(ll i=0;i<n;i++)
#define repl(i,l,r) for(ll i=(l);i<(r);i++)
#define per(i,n) for(ll i=(n)-1;i>=0;i--)
#define perl(i,r,l) for(ll i=r-1;i>=l;i--)
#define fi first
#define se second
#define pb push_back
#define ins insert
#define pqueue(x) priority_queue<x,vector<x>,greater<x>>
#define all(x) (x).begin(),(x).end()
#define CST(x) cout<<fixed<<setprecision(x)
#define vtpl(x,y,z) vector<tuple<x,y,z>>
#define rev(x) reverse(x);
using ll=long long;
using vl=vector<ll>;
using vvl=vector<vector<ll>>;
using pl=pair<ll,ll>;
using vpl=vector<pl>;
using vvpl=vector<vpl>;
const ll MOD=1000000007;
const ll MOD9=998244353;
const int inf=1e9+10;
const ll INF=4e18;
const ll dy[9]={0,1,-1,0,1,1,-1,-1,0};
const ll dx[9]={1,0,0,-1,1,-1,1,-1,0};
template<class T> inline bool chmin(T& a, T b) {
    if (a > b) {
        a = b;
        return true;
    }
    return false;
}
template<class T> inline bool chmax(T& a, T b) {
    if (a < b) {
        a = b;
        return true;
    }
    return false;
}

const int mod = 1000000007;
const int max_n = 200005;
struct mint {
  ll x; // typedef long long ll;
  mint(ll x=0):x((x%mod+mod)%mod){}
  mint operator-() const { return mint(-x);}
  mint& operator+=(const mint a) {
    if ((x += a.x) >= mod) x -= mod;
    return *this;
  }
  mint& operator-=(const mint a) {
    if ((x += mod-a.x) >= mod) x -= mod;
    return *this;
  }
  mint& operator*=(const mint a) { (x *= a.x) %= mod; return *this;}
  mint operator+(const mint a) const { return mint(*this) += a;}
  mint operator-(const mint a) const { return mint(*this) -= a;}
  mint operator*(const mint a) const { return mint(*this) *= a;}
  mint pow(ll t) const {
    if (!t) return 1;
    mint a = pow(t>>1);
    a *= a;
    if (t&1) a *= *this;
    return a;
  }
  bool operator==(const mint &p) const { return x == p.x; }
  bool operator!=(const mint &p) const { return x != p.x; }
  // for prime mod
  mint inv() const { return pow(mod-2);}
  mint& operator/=(const mint a) { return *this *= a.inv();}
  mint operator/(const mint a) const { return mint(*this) /= a;}
};
istream& operator>>(istream& is, mint& a) { return is >> a.x;}
ostream& operator<<(ostream& os, const mint& a) { return os << a.x;}
using vm=vector<mint>;
using vvm=vector<vm>;


template<typename T>
vector<T> matmul(vector<T> &dp, vector<vector<T>> &mt){
    int m=dp.size();
    vector<T> ret(m,0); 
    for(int i=0;i<m;i++){
      for(int j=0;j<m;j++){
        ret[i]+=mt[i][j]*dp[j];
      }
    }
    return ret;
}
template<typename T>
vector<vector<T>> update(vector<vector<T>> &mt){
    ll m=mt.size();
    vector<vector<T>> ret(m,vector<T>(m,0));
    for(int i=0;i<m;i++){
      for(int k=0;k<m;k++){
        for(int j=0;j<m;j++){
          ret[i][j]+=mt[i][k]*mt[k][j];
        }
      }
    }
    return ret;
}
template<typename T>
void matpow(vector<T> &dp, vector<vector<T>> &mt, ll k){
    ll m=dp.size();
    while(k){
        if(k&1)dp=matmul(dp,mt);
        mt=update(mt);
        k>>=1;
    }
}


int main(){
    ll n,m,k,p,q;cin >> n >> m >> k >>p >> q;
    mint r=p;r/=q;
    vm dp(2);
    rep(i,n){
        ll b;cin >> b;
        if(i<m)dp[0]+=b;
        else dp[1]+=b;
    }
    vvm mat(2,vm(2,r));
    mat[0][0]=-r+1;
    mat[1][1]=-r+1;
    matpow(dp,mat,k);
    cout << dp[0] << endl;
}