const MOD: usize = 1e9 as usize + 7;

fn power(base: usize, times: usize) -> usize {
    if times == 0 { return 1usize; }
    if times == 1 { return base; }
    let temp = power(base, times/2);
    temp * temp % MOD * power(base, times%2) % MOD
}

fn power_mat(target: &Vec<Vec<usize>>, times: usize) -> Vec<Vec<usize>> {
    let n = target.len();
    if times == 0 {
        let mut ret = vec![vec![0usize; n]; n];
        for i in 0..n { ret[i][i] = 1; }
        return ret;
    }
    if times == 1 {
        return target.clone();
    }
    let temp = power_mat(target, times/2);
    if times % 2 == 1 {
        calc_mat(&calc_mat(&temp, &temp), target)
    } else {
        calc_mat(&temp, &temp)
    }
}

fn calc_mat(left: &Vec<Vec<usize>>, right: &Vec<Vec<usize>>) -> Vec<Vec<usize>> {
    let sizei = left.len();
    let sizej = right[0].len();
    let sizek = left[0].len();
    let mut ret = vec![vec![0usize; sizej]; sizei];
    for i in 0..sizei {
        for j in 0..sizej {
            ret[i][j] = (0..sizek).map(|k| left[i][k] * right[k][j] % MOD).sum::<usize>() % MOD;
        }
    }
    ret
}

fn main() {
    let mut temp = String::new();
    std::io::stdin().read_line(&mut temp).ok();
    let temp: Vec<usize> = temp.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
    let n = temp[0];
    let m = temp[1];
    let k = temp[2];
    let p = temp[3];
    let q = temp[4];
    let b = (0..n).map(|_| {
            let mut temp = String::new();
            std::io::stdin().read_line(&mut temp).ok();
            let temp: usize = temp.trim().parse().unwrap();
            temp
        })
        .collect::<Vec<_>>();

    let prob = p * power(q, MOD-2) % MOD;
    let revp = (MOD + 1 - prob) % MOD;
    let mat = vec![vec![revp, prob], vec![prob, revp]];
    let mat = power_mat(&mat, k);
    let mut result = 0usize;
    for i in 0..n {
        if i < m {
            result += mat[0][0] * b[i] % MOD;
        } else {
            result += mat[1][0] * b[i] % MOD;
        }
        result %= MOD;
    }
    println!("{}", result);
}