MOD = 10**9 + 7

def main():
    import sys
    input = sys.stdin.read
    data = input().split()
    ptr = 0
    N = int(data[ptr])
    ptr +=1
    M = int(data[ptr])
    ptr +=1
    K = int(data[ptr])
    ptr +=1
    p = int(data[ptr])
    ptr +=1
    q = int(data[ptr])
    ptr +=1
    
    b = []
    for _ in range(N):
        b.append(int(data[ptr]) % MOD)
        ptr +=1
    
    inv_q = pow(q, MOD-2, MOD)
    q_minus_2p = (q - 2 * p) % MOD
    a_mod = (q_minus_2p * inv_q) % MOD
    a_mod_pow_k = pow(a_mod, K, MOD)
    inv_2 = pow(2, MOD-2, MOD)
    
    ans = 0
    for i in range(N):
        if i < M:
            term = (a_mod_pow_k * inv_2) % MOD
            term = (term + inv_2) % MOD
        else:
            term = (1 - a_mod_pow_k) % MOD
            term = (term * inv_2) % MOD
        contribution = (b[i] * term) % MOD
        ans = (ans + contribution) % MOD
    
    print(ans)

if __name__ == "__main__":
    main()